The good old days of saying 50 80 100 is lost with time.
I had spoken to some MLs on this and they are working against the crowd by accepting $50 onwards tips.
Do more, get popular rather than do big and only have irregular customer flow.
All in all, really need to dig out the gems in your area of convenience.
East area alot of such gems... West so far I only managed to find one, too many Cat1 shops in the west it's f up.