Lana- I honestly think that there isn't as much "street gym" about as you think there is!
But I have been at the classes!
I have seen her "routines" from start to finish.
No "sexy" clothes, not one hair flick, no "dance" moves.
Just lots of strength and stamina!
Maybe the one my bro's g/f goes to is the exception, but it was about as traditionally "sexy" as weightlifting!!
Literally identical in almost everyway to street gym except for being indoors, and being done by women.