AMoonHawk saidthe more you check on your customers, the better your tip. ...
Checking on your tables is a calculated art form. I'd much rather my waiter only check a couple times throughout the meal than breathe down my throat every minute asking if everything is ok, especially while I'm in the middle of chewing and have to hurry force down the bite to tell him yes for the 30th time.
I mean check, like walk by and see if the have water, need another drink, need more coffee, bread sticks etc. There is nothing hate worse than the disappearing waiter. They take your order deliver your drinks and food then you never see them again. If they would just walk by and around without saying a word is fine just so you can ask them for something if you need it.
But again, back to quick money. I'm not sure how much those guys make with the advertising signs on the street but I'd guess it would be cash at the end of the day. Hit up tatoo parlors or pot shops (if they have them out their). There always seem to be different ones around these parts, but my guess is that it gets them through a week.