Here's a late answer! We have access to a church hall (free) and have used it every year since a famous millennium 'do' in 2000 as a hogmanay function for close friends and family. Keep things simple. We provide the venue, basic food - good homemade soup, big selection of snacks and let the guests bring their own favourite tipples and snacks. Keep the music low level for a while to let folks chat and reminisce and whack it up later when they've had sufficient lubrication to dance. Keep games simple - 'pass the parcel', 'musical chairs', 'musical bumps or statues works well when there are kiddies around. Later, have races with teams to pass the "whatever item you deem appropriate" along the line. It could be cards, knickers, socks or whatever - you be the judge. The main thing is to keep the rules simple. Hope this helps. Cheers, Andy