Oddly enough I rarely go to a music store. I'm really an impulsive buyer so it's better not o spend too much time in these place. Too hard on the credit card :)
When I go in, it's to buy something. If I need strings I'll go in and get out as fast as possible. Otherwise I'll end up buying an other instrument....
I don't know if there's someone like me but I suck when I play another guitar than mine. I don't know why but I can't play as well. So usually I don't try to shred and just play a small blues or chord progression to get a good feeling of the guitar.
I can say I never impressed anyone in a music store lol