What are some venues (besides clubs) where attractive women can be found in abundance?

I'm in my late 20's and finding that the bar scene just doesn't interest me any more. What does interest me is waking up early to hit the gym so that I can maximize my self-improvement. Chasing after drunk girls late at night in a bar just isn't my idea of a good time, but for so many years it was my primary way of meeting new women.

What are some places where attractive young women (18-22, ideally) can be found in abundance, and where approaching them is relatively socially acceptable? I need some new venues. Malls? The gym? Yoga class? Coffee shops?

(EDIT: Just want to say thanks for all the great tips guys, really appreciate it.)