Busking? You can't score a real gig, or an amatuer demo? If you're
busking, here's one tip. Play public domain songs. Why? No royalties.
If you play someone elses copyrighted material without a performance
license and making money off it, you're ripping them off. So, make sure
you get the performance license to play the songs live in public.
Then, for location: choose a place that is near bars and cafes or where
the owners of those types of places are likely to be passing by. If they like you, they might give you a real gig.