Of course it's weird to pretend your interested in yoga just to be around athletic women. Why wouldn't a woman find that creepy? I just don't believe that men are only interested in highly masculine, man only spaces. There's loads of cool non-gendered stuff to do; glasswork, painting, woodcraft, archaeology, judo, amateur dramatics, language classes, writing groups, re-enactments, history clubs, tango, cooking, pottery, metal work, even shoemaking. I'm pretty sure most men would be a bit weirded out if I decided to start attending body building classes for men too. It's creepy and obviously sexual. So you can 'win', you just need to accept that you're not going to find a girlfriend at a man's boxing club.