First time in 15 years I left no tip at a restaurant. I went alone so I guess they were not interested in a single party.
I did not have an actual waiter. I have no idea who the old guy in an apron was that served me. Someone brought me a bread with no butter or oil. Someone else brought me a can of soda. I had to request a glass! The pizza I ordered had so much cheese it was gross.
I should have followed my instincts and walked out when I saw the place. Bright cafeteria lights, Marriott convention chairs, cheese ball paintings. No greeting or indication of what to do upon entering.
Just a very unwelcoming experience.