I guess you have to be creative. Find a friend/relative with a car. Find a show. Then find something near the show that the friend likes (a great shopping mall, a restaurant, a movie theatre, etc.). Have them drive you to the show and drop you off with an understanding of what time they are to pick you up. Then they can go do what they enjoy nearby.

Good luck!

I hope you get one. If not, you'll be 18 someday and on your own. No worries!