My girlfriend talked me into attending her lunchtime Pilates class, with the argument that improving my core strength will help improve my overall fitness. I was, as I predicted the only guy there, and I was quite dubious about whether the class would actually DO anything, however I followed instructions dutifully and we worked on stabilising our core area (the abdomen, back and pelvic region) and some interesting shoulder exercises that I think might help improve my weight work, and finished up with some twisty stretches. Now I'm sat back at my desk, I can feel that I've worked these areas.
While I didn't LOVE the class it was a pleasant enough way to pass an hour and I feel I've picked up a few good pointers for strenghtening my core muscles. So moderate success I'd say!