If you're going for a cheesy 80s vibe then:
Respectable - Mel & Kim
Come On Eileen
Don't you want me baby - Human League
anything by Erasure
" Pet Shop Boys
" Jimmy Somerville
" Culture Club
If you're just looking for some good music then I'd be more inclined to ask all the guests to choose a song they'd like to dance to. That way when their song comes on they'll feel obliged to dance! Plus you might get a bit more variety that way instead of all the 80s music!