You know how entrenched your guests are likely to be!
But I'd go for a lot of late 80s - the stuff people will all know and remember and think fondly of their (wild) youth.
Transvision Vamp, Queen, FGTH, Soul2Soul, Springsteen, Pet Shop Boys, Fine Young Cannibals, Dead or Alive, Divine, Redskins, Doctor and the Medics, the Communards, Nina Simone, Bon Jovi, Blondie, Detroit Spinners, Adam and the Ants, Kellie Marie, Wham!, Soft Cell, Human League, Depeche Mode, The Jam, Eddie Grant, Bonnie Tyler, Duran Duran, Madonna, Yazz, T'Pau, The Bangles, Kylie, The Timelords, Pepsi and Shirley, Belinda Carlisle.
Any good?