It is DD's 18th birthday in a few weeks. We have hired a village hall and a disco. We will do a small amount of decoration, no food, lots of soft drinks. It will be fancy dress. We won't be in attendance but will be in the pub down the road so they know that adults are keeping a watchful eye on them. Judging by (what DD has told me of!) parties last year, they are a fairly sensible crowd so there shouldn't be a problem with drugs or drink (I am expecting them to bring their own booze but not go crazy).
Has anybody got any top tips or dire warnings?