We've been there when it's ramping up to Crazy-Land as early as 10:45 a.m. or so, but that's only been in April. Go Addicts! But, typically, by about 12:30 p.m. everyone's out there, it's heating up literally, the dumb stuff like water aerobics are over and the decent music starts to play, so... yeah... I'd say averages about 12:00 noon to 12:30 p.m.
John not everyone sleeps till 10 like you, April addicts starts at 7 am to I think it was 7 pm, don't remember it I was little bit drunk.
By 7AM all the chairs will be spoke for but its 10 before people start accumulating. Once the sun passes over the building it gets chilly fast in February.