maestro guitar and zen guitarworks have good service!
once i went there to collect my serviced bass, the salesperson literally "forced" me to try some of the basses on display there. now that's what i call excellent customer service. of course, the shop was relatively empty, and the salesperson was incidentally a bassist too.
Aiya... there's no big deal. just go to any store, tell them that you are looking for a guitar and would like to try one, tell the sales person what you are looking for, be polite, and they'll help you out.
I had a very good experience at the Maestro shop a couple of weeks ago. Maybe it looked like I wanted to buy but I just wanted to play a Maestro - to see what it was all about. AND I have a brother who wants to buy one. So I didn't feel all that bad giving it a go over there.
The salespeople were great and very knowledgeable. And it's a bonus when they complement on your playing. :-D