Aha! You're very close! I think that usage is rather British. I really fixed him, didn't I? I'd like to go out with her, wouldn't I? I guess you could call it a rhetorical question.
I believe in this case, we're extending an invitation to another person: I'd like to play tennis. Wouldn't you? It's similar to: I'd like to go out
Is this a question you invented, or did you take it from a textbook? If the latter, I think it's a poor question. It seems to be asking for "I'd like to play tennis, wouldn't I?", but that's an unusual thing to say, making one uncertain if it really is the expected answer.