Which demographic tips the worst ?

I've heard personal stories from Uber drivers and servers but I'd like to know from the misc if the stereotype holds true im not revealing what I know because of course that would contaminate the experiment


GO!
540 pound deadlift

100 pound DB shoulder pressesx10\
225x28 barbell bench
405x10 deadlift
405 bench press

Leader-NOT a follower ..i am my own crew
warrior archetype
Gladiator school graduate
Carl Jung protege

Self taught and fluent in Spanish