For a situation, not a mood.
Raining, short on time, going alone or bringing someone: each list is a rule over what places say about themselves, printed on its page, and the places are whatever meets it today.
Rainy day
Places whose own description says they're indoors (a studio, gym, center or "indoor"), or indoors and outdoors.
46 places
Under an hour
Places whose own words state how long a class or session runs, and the longest stated length is 60 minutes or less. Places that don't say aren't here.
14 places
Before work
Places whose published regular times include a weekday start before 9am (the finder's "Before work" time slot).
15 places
Going alone
Places that say beginners are welcome, and either let you just walk in or drop in (in their own booking words), or are clubs that answer "will I be the slowest?" themselves.
7 places
Bring a friend
Places with "Meet people" among their moods: clubs, leagues, group runs and hikes, and places that are built around company.
18 places
Not published yet, because fewer than 5 places meet the rule today: Pay what you wish (2). A list goes up by itself once 5 do.