Ways to settle who goes first, who pays, or who is on which team — plus a couple of small games to play while you argue about it.
When a group decides an order or a forfeit, a genuinely random outcome is not enough. Everyone has to watch the process and accept it. That is why rock-paper-scissors survives — not because the algorithm is good, but because there is visibly no room to rig it.
So the tools here do not simply announce a result. The ladder draws its lines in view, the marble roulette runs an actual race, and the darts and dice go through a throw. Showing the process is the feature.
Arguments over a draw almost never concern the algorithm; they concern the rules. How many get picked, whether someone already picked returns to the pool, and whether a re-draw is allowed — settle those three out loud, before drawing.
Re-drawing is the dangerous one. Permit it after seeing the result and it stops being a draw. If re-draws are allowed, fix the count in advance («at most twice»).
The larger the group or the higher the stakes, the more it matters that everyone watches the same screen. One person drawing alone and reporting the outcome invites doubt no matter how fair the mechanism is.
A ladder draw is a one-to-one mapping. There are as many outcomes as participants and each person gets exactly one. Every horizontal rung swaps two vertical lines, so no matter how many rungs are drawn, two people can never land on the same outcome. That property is what makes it fair.
Splitting teams is a partition. Dividing eight people into two teams is a different problem from three, and when the count does not divide evenly something has to decide which team carries the extra person. Balancing skill on top of that needs an allocation rule, not randomness.
Mixing them up feels wrong for that reason. «Who gets what» is a ladder; «who is with whom» is a team split.
Roll two dice and seven is the most likely total, because six combinations produce it while two and twelve have one each. Add more dice and the distribution of totals concentrates further toward the middle. Knowing that lets you tune the difficulty of a forfeit game deliberately.
Darts is skill rather than chance, but the board layout is interesting in its own right: 1 and 5 sit either side of 20, so a miss on the 20 is expensive. For inconsistent throwers, aiming near 19 — flanked by 7 and 3 — can carry a better expected score.
Cricket and the 01 games have opposite goals. In 01 you must land exactly on zero; in cricket you close numbers by hitting each three times.
Reaction and aim tests are used to find who is quickest, but passing a phone around a table turns them into a game on their own. The score is a number, so ranking is trivial, and a round takes thirty seconds.
The plate balance game implements inverted-pendulum physics directly. To keep the pole up you have to move the base toward the direction it is falling, which is the opposite of intuition, so almost everybody fails at first. Scores start climbing the moment that reversal clicks.
Every draw uses the browser's random number generator. The same input gives a different result next time, and no name or position carries a weight. Because no server is involved, there is structurally no one who could know the outcome in advance.
Participant names stay inside the browser and are not transmitted. Nothing requires an account, and nothing survives closing the page.