One note on bad service: I never don't tip. The person giving you shitty service at the restaurant needs to know you didn't just forget. If I'm pissed that I didn't get the drink I ordered until after I finished my meal, I leave a dollar under the glass.
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"Guage once told me that there is nothing worse than eaten ass of a black dude thats been huffen drain cleaner the night befor." - delanoojos