≤15% | My wife insists on tipping based on the regular price of a meal/drinks when getting a happy hour or some other discount. For example, if a happy hour with discounts off appetizers and drinks and would normally cost $20 and the bill comes out to $15, she wants to base the tip off of the $20. Does it make me cheap to just pay the 20% on the lower price?

Yes, always tip on the full amount if you’re getting hooked up with some sort of deal.