This reminded me of my spring break trip to Ft. Lauderdale my senior year at PSU (1985). Before leaving for Florida a fraternity brother (who went the previous year) told me if I went to one of those all you can eat/drink for $10 places to make sure I tipped the bartender for the first drink. The bar of course was packed and it took me awhile to get up there and ordered a gin and tonic (it was also suggested to get hard alcohol over beer) and tipped the guy $5. His eyes got big because none of the other cheap college students were tipping at all and he said THANKS! When going up for my next one the bartender pointed over four rows deep of patrons and said "Gin and tonic, right?". I said yeah and he handed one over some ticked off students. I easily got twice as many drinks as everyone else for my $5 investment.
I made sure to thank my fraternity brother upon returning and never forgot that experience. So I guess the lesson learned is to tip good early!?