get a few proffessional strobe lights, some good black lights, a minifridge
go down to your local salvation army to find a minifridge....or look through some garage sales
also they might have a glass display case at the salvation army
get some neon colored wall paper and neon colored...well..everything
everything must be neon, it will look badass under a blacklight
get a steroe and rig it with surround sound, get some rave music...you know, that stuff with nothing but trippy ass beats...
get a coffee table and paint it neon colors
the rest...well..is up to you
EDIT: if you having trouble finding a good black light and strobe light, go down to a sign makers shop and ask them about it

also get some couches and put neon colored blankets over them