By all means I'm not a fan of tipping culture.. Nonetheless it is what it is.. If I have a bill to sign I always leave 20%. Never been billed for it.. When I have no check, I usually leave a few bucks, just because I can.. I'm far from wealthy, but I always tip on free drinks in lounges $2 each, and have no problem tipping on a free breakfast. At the end of the day it is helping someone out, and I'm more than happy to do it.. My typical visit to an Admirals club costs me about $14 (7 premium drinks, as I get plenty chits) That's the same as I pay for a shot low range scotch at a decent place.. DFW bartenders seem to always remember me and take care of me