We often get take-out at restaurants that also have sit-down service(usually Indian and Chinese food) and there's always a spot on the bill for a tip. I never leave one because I figure a tip is for service - I tip wait staff and delivery people for their services, but what would the tip be if someone is just handing you a bag of food?
Well, last week the guy opened the folder and looked at the bill and I swear he gave me a dirty look when he saw I had not left a tip.
Do you tip? If so, what % and who exactly is the tip for?