We were at an 8 year old's party at the weekend at a local burger joint.
We allow our DD to have coke occasionally- I don't outright ban anything because I believe the minute you make something "banned" you're making something seem more attractive.
Before the party we were looking at the menu and it said any soft drink was included. So DD asked whether she could have a Coke as part of her meal deal and I said yes.
So we get to the venue and the waitress was very efficiently taking the orders from the children (parents were sitting on a separate table)
I saw one of the mums talking to the waitress and thought nothing of it. Said mum then came up to the parents - including the birthday girls parents who were picking up the tab and announced "I don't let (DD) have Coke and I don't think it's fair for all the other children to have Coke and not my DD so I've told the waitress to tell the children they can't have Coke when she takes their order"
We were all 
but were all too polite to say anything!
So what would you have done in this situation? Was the mum in question right to do this?