Just ask people's opinion people! Its not that hard. Find someone in the cafe that looks like they fit your target demographic and isn't too busy. Put a smile

Just ask people's opinion people! Its not that hard. Find someone in the cafe that looks like they fit your target demographic and isn't too busy. Put a smile on your face, walk up to them and say "Hi ... my name is xxxx, I was wondering if you could help me figure out some possible problems with this business idea I've got. And no ... I promise I'm not going to try to sell you anything" Smile again. Rinse, repeat and refine as necessary.