Groupon coupons even have a note to prevent poor tipping:
"*Remember: Groupon customers tip on the full␣ amount of the pre-discounted bill (and tip␣ generously). That's why we are the coolest␣ customers out there."
In the few groupons I've used, I've tipped more than my normal 20% on the full price because I know I've saved money. Except for the one time when I encountered a waitress that acted like groupons were a hassle. It makes me think that poor tipping is exacerbated by a feedback loop: Waiters give worse service or are less enthusiastic to groupon holders, which leads the groupon holders to tip less thereby reinforcing the waiters' impression.
"*Remember: Groupon customers tip on the full␣ amount of the pre-discounted bill (and tip␣ generously). That's why we are the coolest␣ customers out there."
In the few groupons I've used, I've tipped more than my normal 20% on the full price because I know I've saved money. Except for the one time when I encountered a waitress that acted like groupons were a hassle. It makes me think that poor tipping is exacerbated by a feedback loop: Waiters give worse service or are less enthusiastic to groupon holders, which leads the groupon holders to tip less thereby reinforcing the waiters' impression.