Look for a place in your area that supplies lighting and sound equipment for events in RI.
Just google it..you should find atleast one or two.
I don't know if black lights and lasers are completely necessary..if you just get some regular lights that the drama department no doubt has and put brighter colored gels (such as hot pink, blue, green..things you would see at a rave party) in them, and then use strobes, you should be fine.
Have fun with the rave. lol