Interesting thing happened to me the other day. I got Tacos and quesadillas at a local restaurant. It had workers who looked like ones who would be familiar with making tacos.. they had a card reader that was set up for tips and the guy declined the tip option. I wanted to give a tip so thankfully I had some cash and they had a jar there. You can get a crap load of tacos for 20 bucks. It would feel wrong not to leave something. I just wondered why he opted out of it..