I used to make fun of SoulCycle. Now I'm an addict. - Vox
I guess we'll be seeing this in Australia soon enough, if it's not already here.
Speaking of exercise in groups (a concept I've always had trouble with), at the local Council swimming pool last weekend I noticed that the free aqua zumba class is terribly popular, but with about 95% of the participants being distinctly unfit looking middle aged women, 3% younger fitter women, and about 2% men. Although it is only the start of summer, and it may be that they will be all svelte beauties by the end of the season, I think the more likely assumption is that it gives them the sensation of being useful exercise, when it really isn't.