My son wants to have a Halloween party for about 25 kids. My husband and I will be upstairs. He is inviting different groups of friends. His main group do drink casually and in previous get togethers (not at ours) they usually just bring whatever it is they want to drink. I was thinking of not serving alcohol but turning a blind eye to anything that’s brought in. He has already told his friends that I wouldn’t be happy re anyone being off their heads (not sure how much that matters to them😂). He has also invited other friends outside of this group though. Should I let parents know there’ll be drinking? I don’t know half the parents so not sure how I’d even go about getting phone numbers! They’re in year 12 so 16/17yr olds as opposed to 15/16yr olds. Any advice much appreciated (also any advise re food/deco much appreciated: I’ve been told to curb my tendency to organise party games 🙈).