Sure a high chance of meeting women (which is nice if you don't want to be Forever Alone), but other than the ability to strech a little more what is the gain?
It's excercise like any other, it's just using the body's own weight instead of dumbbells to create load. Stretchin is a lesser part of yoga than strength.
I've gained strength, flexibility, and feel fantastic every time I leave a session. I also believe I'm less stressed and can focus better.
The classes I attend present the physical aspects as a gateway into meditation and relaxation.