That shows that you are interested in being on the show when they are comfroatble with you being on the show. If a booker books you off the back and you fail YOU WILL 95% OF THE TIME NEVER BE CALLED BACK TO PERFORM. If you show them you can handle their room and can be a vital part of their show. In my experience if you come up with an attitude of I would like to be apart of your show after I show you I can be great on stage it'll forge a better relationship with the booker as well. Even if you don't kill during your audition and don't get the part in the next show you have shown them you just need to work a little bit more and you'll be ready. Never put pressure on a booker. EVER. NEVER EVER. You have a talent that you want to show everyone and the booker wants talent. That's their job to find talent and make sure the show is going to be awesome. If you show them that you can be awesome they will put you on the show and have you back.