I'm an American and I don't even know when to tip in this country. I guess you now are supposed to tip the cleaning staff at hotels, but only certain chains? Wh

I'm an American and I don't even know when to tip in this country. I guess you now are supposed to tip the cleaning staff at hotels, but only certain chains? What about restaurants with no table service or food carts? Also seems to depend on the chain, whether the owner is working or an employee is working, or who knows what.