I'm thinking of asking my two guy friends to take me to a festival in June using one of their cars.
Are you guys going as a group?
No, It's just going to be me.
It's definitely okay to ask a favor from a friend if it's not too much trouble for them to do. Asking one of your friends to drive you to a festival wouldn't be too much of an imposition as long as the distance is short. However, keep in mind when you receive a favor from a friend you should always remember it and try to repay the favor whenever an opportunity arises.
It's fine, it's just a small adventure within my city that's all. There is no need to thank him.
It is good to help people if you can. I would not try to abuse it by asking them for too much it might be fun to invite them all to the festival too.