Should I ask friends for money for gas?
Maybe. Why do you need money for gas?
So we can go out together
It is good to have every one contribute to a function. It is very reasonable to share the cost of a trip and can help fund longer expeditions.
I'm going to do it. I want to since I have fun being a bum.
Well I don't think that makes you a bum. But it is okay to have them pitch in and the trip won't cost you so much. You will be able to have more fun if you don't have to worry about money.