At the monthly brony meetup in Cologne, Germany we usually also do 3 to 8 hours of karaoke and/or trotmania.
I'll randomly add new images in this thread as a collection.
From spring til fall/autumn we usually meet near a lake on a meadow and bring one or two laptops, our selfmade "Stammtischanlage" (two speakers, an efficient amplifier and a 12v battery from some old uninterrupted power supply unit) and 6 singstar microphones.
The cologne brony meetup usually consists of 60 to 80 bronys - some of them regularly traveling 5 hours just to get here - and we also have a barbecue + provide other food + non alcoholic drinks. We usually do one hour of pony cinema just after sunset. Personally, I think this is almost on the same level of entertainment as some small conventions are.