ClassPass teams up with the best studios and gyms in your area to offer you classes. You could take boxing one day and be at barre the next. It's a pretty awesome deal if you want to dip your toes in different things. You could definitely waive a gym membership, and just do this. They even offer gym time as a class option, if you just want to get in there and do your own thing.
It just launched here in Phoenix, so I'm super pumped! It's also in these cities: New York City, Boston, San Francisco, Los Angeles, Chicago, Washington DC, Seattle, San Diego, Portland, Dallas, Austin, Miami, Denver, and Philadelphia.
ClassPass is so nice that they wanted my readers and followers to skip the waitlist. You can do so here.