Dating at the gym

[Louise]

I'm a single girl who goes to the gym regularly. I've started to chat to a few guys and I'm keen to ask one of them on a date. However,. I'm not really sure of the etiquette here. Is it okay to ask your gym 'friends' out on a date? What if he turns me down? I'll look a fool in front of him and his friends. Not only that but being turned down will make me less likely to want to go to the gym for my daily workout.

What should I do?