[motoeric]

If you are as professional as possible, go to them with a written plan and explain how they will benefit, I think that you have a very good chance.

Try to get the attendance numbers for the events that you will be attending. Check with the organizers to see if you can do sampling or handing out of flyers. Explain to the store that you are a loyal customer and these events will help you to get the word out about how great they are.

Bring photos of crowds from past events.

If you put in the effort to create a professional sponsorship package, you have a reasonable shot.

Eric