You can even hang 45s or CDs from the ceiling - and a disco ball makes a nice finishing touch.
Hang a faux rented chandelier or even disco ball over the center of the dance floor.
Shiny beads and sequins are also great elements, but remember to steer clear of falling prey to the too much factor - you don't want to look like a disco ball.
Choose an item like a pop can coozie or hanging disco ball that guests can take home with them.
Colored lights aimed at a disco ball offer another option that works with the theme.