The dollar amounts involved suggest you might be best off settling this with her personally, or, failing that, in small claims court. There's not...

Can service be denied to me if I have a service dog?

Stores cannot generally deny you entrance simply because you have a service animal. Consult an attorney to see if an ADA violation may be alleged.

Yes, you need written consent. Have a release ready for them to sign on the spot.

What way can I make sure the agreement favors me and protects my music?

I agree with what the other attorneys have said, but I'd add that you need to make sure you hire an attorney who specializes in music. Music law...

I am looking for an entertainment lawyer to go over a producer agreement.

You're right that it's important to have an entertainment attorney review (and possibly negotiate) a producer agreement before you even consider...