It's one of the shitty things about working brunch. Church folk come in with largish parties, same group every week. They leave pamphlets and no or a meager tip. They end up getting a reputation and bad service. Not all of them leave bad tips but lots of wait staff are biggoted assholes who play the average.
A new party shows up in their Church best on a Sunday and get written off as bad tippers, receive bad service and leave a bad tip and a pamphlet because their eternal soul is in peril and they were terrible waiters. Both sides end up thinking less if the other.
Parents with young kids and black or brown people often get the same treatment.
I've heard some horrible shit, "I don't want to wait on those nigs." Tell my shitty coworker to give me the table and no I'm not giving them my next table in return. Treat people decent and usually pull at at least a 15% top in return, often more when they receive shockingly decent service.