Free-form movement to a scored set of music, in silence, with no talking, no alcohol and no phones on the floor. Sustained hard movement for two hours produces a genuine shift in state, and the no-talking rule is what separates it from a nightclub.
The two organised lineages have actual teacher training behind them: 5Rhythms, built by Gabrielle Roth around a five-part wave from flowing through staccato, chaos and lyrical to stillness, and Open Floor, founded by senior 5Rhythms teachers. Both publish their teachers.
Separately there is a large open community scene, usually branded Ecstatic Dance, which runs weekly in most cities with a DJ and a set of agreements read out at the start. It is cheap, drop-in and inconsistent in quality, and it is by far the easiest thing on this page to try this week rather than next year.
This one earns its place because chaos-phase movement for an hour reliably gets people somewhere they cannot talk themselves into. It is also the most social option here, which for some people is the actual medicine.
A representative shape drawn from how these are typically run. Use it as something to ask against, not as any one centre's timetable.