For what it's worth, I thought I'd post what I believe to be a list of some of the all-time disco classics. No authentic disco experience should be without these tunes:

Donna Summer - I Feel Love (preferbly the Cowley 15 minute mixes!)
Giorgio Moroder - From Here To Eternity
Dee D. Jackson - Automatic Lover
Cerrone - Supernature
Players' Association - Turn The Music Up
Edwin Starr - Contact
Chic - I Want Your Love
Sylvester - You Make Me Feel Mighty Real
M - Pop Muzik (possibly the greatest intro of almost any song ever!)

Go for it! Feel free to add yours here.