That'd be a dance "troupe", actually :-) Gotta get the lingo down...
I used to do this a bit. If it's during a performance, you have problems... They won't let you strobe, and there won't be enough light to freeze the movement, most likely. You'll have to use high ISO, that's for sure.
If it's during rehearsal, they may let you set up strobes, but unless you're doing staged shots (as opposed to shooting the actual rehearsal), those strobes are gonna be way out around the periphery (the dancers need all the real estate of the stage to move in, it's a 3-dimensional art) and you'll need honking big strobes, and several of them, to get any coverage.
I donno, there are a lot of variables... Sometimes you'll have a venue where the stage lighting can be cranked WAY up and that helps a lot.
Whichever, good luck with it. It's a lot of fun, actually.
R. |