How do you run a badminton club night that people come back to?

Every club night has a hard number behind it, and almost nobody works it out before the hall is booked.

Courts × hours = court-hours. Divide by the length of one game, multiply by four (badminton doubles puts four people on a court), and divide by the number of people who turned up. That is how many games each person gets.

Setup	Court-hours	At 3 games to 21	At one game to 21
4 courts, 2 hours, 20 people	8	2 games each	6 games each
4 courts, 2 hours, 28 people	8	1–2 games each	4 games each
6 courts, 2 hours, 24 people	12	3 games each	7 games each
2 courts, 2 hours, 12 people	4	2 games each	5 games each

The difference between the two right-hand columns is the whole guide. Nothing about the hall changed; only the unit of play did.

At two games an evening a player spends roughly seventy minutes sitting down, which is what people mean when they say a club night felt disorganised. It usually was not disorganised. It was long-format.

Clubs often shorten games and feel faintly guilty about it, as if the real sport were being diluted. It is not. BWF Statutes Section 4.1.4 permits three alternatives to the standard system by prior arrangement:

• One game to 21 — change ends at 11, deuce from 20-all, cap at 30.
• Best of three games to 15 — deuce from 14-all, cap at 21, interval and change of ends at 8.
• Best of five games to 11 — interval and change of ends at 6, in the fifth game only.

For a club night, one game to 21 is the natural unit. It takes twelve to eighteen minutes, it produces a clean winner, and it is complete badminton rather than a truncated version of it. Nobody has to invent a rule and nobody argues about the format.

If your evening runs 90 minutes rather than 120, drop to a single game to 15 by the same logic. It is not a listed alternative in the statutes, so call it what it is — a club format — rather than presenting it as a BWF option.

Four systems cover almost every club night, and they differ mostly in how fairly they distribute playing time.

Winners stay on. The losing pair leaves, the next pair from the queue comes in. Simple, needs no organiser, and has an ugly failure mode: the strongest pair plays all night while the weakest pair plays once every twenty minutes. Use it for a drop-in session, not for a club that wants people to return.

Everyone off after each game. Both pairs leave and four new players come on. It costs a minute of changeover and it distributes time almost perfectly. This is the default a well-run club night should start from.

Timed rounds. A whistle every twelve minutes, everyone rotates regardless of score. Playing time becomes exactly equal and the evening finishes on schedule, which matters when the hall has a hard stop. The cost is unfinished games, which some players mind more than you expect.

Americano. Partners change every round, opponents change every round, and points accumulate to the individual rather than the pair. It solves the mixed-level problem by never letting a level pairing persist, and it turns the evening into a competition without turning it into a tournament.

Whatever you choose, the property that decides whether it works is the signal. A rotation that depends on someone noticing the game ended and shouting across the hall will break down by the third round. A whistle, a clock on the wall, or a phone showing the next round makes it hold.

Americano was popularised by padel and fits badminton doubles exactly, because both are 2 versus 2 with mixed levels in the same session.

The shape: everyone is entered as an individual, not as a pair. Each round the software draws new pairings, each court plays to a fixed number of points — 16, 21, 24 or 32 — and both players on the winning side take the points they scored. Over five or six rounds an individual table emerges, and it measures the player rather than the partnership.

Mexicano is the variant where the next round's pairings follow the current standings: first plays with fourth against second and third, and so on. It converges faster on a true ranking and it keeps the top of the table competitive to the last round.

In JudgeMate both are available once the category is set to doubles, alongside the more familiar knockout, round robin and groups. A singles category offers only the three bracket formats, which is correct — americano is a four-players-per-court format and has no singles meaning.

One caution worth stating: an americano evening needs the number of players to divide neatly onto courts. Sixteen players on four courts is perfect. Eighteen means two people sit out each round, which is fine if you rotate who they are and awkward if you do not.

Most club nights are not badly organised. They are badly matched. A beginner and a county player on the same court is a bad twelve minutes for both.

Three approaches work, in ascending order of effort:

Split the courts. Two courts for the stronger group, two for the rest, and one nominated person who moves players between them during the evening. Crude, effective, and slightly uncomfortable to announce — which is why most clubs do it informally and badly instead of formally and well.

Balance every pairing. Pair the strongest with the weakest each round. It keeps games close, which is what people actually want, and it costs you a minute of thinking per round unless the rotation does it for you.

Let the standings do it. Mexicano pairings follow the table, so after two rounds the system has sorted the room by results rather than by reputation. This is the version that handles the player who thinks they are better than they are, without anyone having to say so.

Whichever you use, say it out loud at the start of the evening. The complaint you get about levels is almost never about the levels. It is about not knowing the rule.

A club night that keeps a running table across the season stops being an evening and becomes a reason to show up in February.

The lightest version: keep the individual americano points from each night and add them up. No fixtures, no commitment, no captain — just a table that rewards turning up and playing well. Players who miss three weeks are not eliminated, only behind.

The heavier version is a proper league with fixed pairs and scheduled fixtures, which is a different commitment and a different guide. Most clubs overestimate how much of that they want and underestimate how much a simple cumulative table delivers.

Two honest limits before you plan around the software. There is no court booking and no payments — the hall and the money stay wherever they live now. And tournament results do not export to CSV in any sport, so if your club secretary wants a spreadsheet at the end of the season, they will be reading a web page instead.