This came up in another thread and was curious as to other people's opinion. Especially after talking to a friend that is a bartender at a nice cocktail bar. What is your normal tipping amount? Does it change from a restaurant to a bar (ie...eating dinner and being waited on versus just getting drinks? Do you tip less if it counter service versus table service? Do you tip different amounts depending on level of establishment (waffle house versus mickey mantles)?

Also, how old are you if you don't mind sharing. I thought the norm was 20% but according to my bartender friend, the norm is about 10% but the older patrons tip closer to 20% as norm.