Disco Dance Ideas?

Our family organizes a big disco dance in memory of my late uncle every April. We are planning for this years dance and are wondering if there are any exciting/disco themed decorating ideas out there that we're missing? I'd love to get one of those light-up dance floors like from Saturday Night Fever but no idea where to rent one - I found one site that would sell me one, for like $2500 for a 4x4 square... no thanks!

I live in Cape Breton, Nova Scotia, Canada, so sending me to a party shop somewhere in California isn't going to help. I'm looking for online resources and any other tips and tricks we can use to decorate or plan our dance. Thank you!