I don't think its rude to take a healthy food platter for everyone to share so definitely take one.
Also they sell low cal wine now, take a bottle with you have one glass throughout the night, slowly sipping it so you don't feel like you are missing out and you don't feel guilty for all the extra cals.
And drive there too so you can only have one and no more.
Start weight - 77kgs
Goal weight - 53kgs
Current Weight - 50.1kgs
No more weighing, no more scales. My measurement is my success at health. It's an investment I make every single day. My priority: be healthy!