I tip less often than the average American because I’m from Australia. Also tipping is dehumanising, no one should have to dance for their supper.

In general, I tip 20% at restaurants and salons, food delivery services typically get a flat tip of $7 per order, maybe a few bucks if I’m picking up the food myself, and $1 per coffee or drink at a bar. If service is really good or really awful (ie, the server is rude), I adjust accordingly.