Is tipping an expectation in Chicago?
I recently visited Chinatown in Chicago and ate at a Vietnamese restaurant. The food was very good, but I found the service to be okay. No one was outwardly rude, but anytime I asked for anything such as a to-go container for my leftovers, I was met with an eyeroll and a heavy sigh. For more context, I am not white and didn't grow up knowing that tipping was such a huge expectation in America but I still tip almost any time I go out. I am also from Iowa, where tipping is often expected but not forced or demanded.
I was with a group of friends and we asked to split the bill (which was met by a heavy sigh and some confusion from the waitress) and when my friend was paying the cashier kept telling him to circle a tip percentage. We have already agreed that only one person would tip and we would later split the tip, so we let her know that he wouldn't be tipping. She got agitated and kept repeating that he needed to circle a tip percentage and even pulled out an old receipt to show us that other people tipped 20%. We tried to explain that he wasn't going to tip but she continued to argue and wouldn't take his card to pay.
When it was my turn to pay after my friend paid, I handed her my card and she chose the gratuity percent on her computer and tried to charge me 20% gratuity. I told her to remove that and that I would only be paying for my food, to which she kept arguing. I thought maybe tipping was expected in this area, so I asked if tipping was optional, to which she replied no. I obviously know that tipping is optional, and none of us ended up tipping because we were upset with her attitude. I am starting to wonder if I am in the wrong here. Is tipping something that is required or expected in Chicago?