My reason for asking the following is not to be critical but to fit in with the local culture. I would very much like to understand what is expected in the way of tips in the USA. I live in northern Italy where tips are not expected, not even in restaurants and I rarely leave one. Sometimes the restaurant cashier will actually round my bill down from say euros to 70 so obviously our culture here is very different. Please help me understand how I should behave in a restaurant when it comes to paying - I have been to the States before but always with my American friends, this time I might have to deal with things myself. Thank you.