This happened afew months ago and was just talking to a friend about something similar and it came up. Thought I would get mumsnetters opinions.
Having lunch with DH at a restaurant heavily pregnant. Waiter making small talk asking different questions about the baby including the gender. When I said girl he turned to DH and went 'ohh gutted' DH said no he's more than happy to be having a daughter. To which waiter said 'yeah right every man wants a son.' Safe to say he didn't get a tip. My friend found it hilarious I didn't tip him. I did feel guilty after as I suppose he was only making conversation. WIBU not tipping him? (This is only lighthearted I hadn't thought of it until today and my friends reaction made me wonder)