Last week I went alone to a restaurant after 9pm just for coffee and dessert. They sat me in a two person booth. I stayed for a few hours doing paperwork from the office while my waiter came by a few times to give me free refills.
The bill was $10.80. I thought that a tip of the standard 20% or $2.00 was ridiculously small for all the time and attention spent on me so I gave my waiter a $20 bill and said to keep the change. This is a tip of around $9.00 which I guess makes sense since I was in a two person booth for a few hours. I go to this restaurant from time to time (mostly alone but sometimes with dining companions) and I want them to be happy to wait on me since it makes for a more enjoyable experience for me.
How do other readers of this forum figure out what to tip when the standard 20% doesn't seem to make sense? Examples would be helpful.