Either buy a lovely selection of 80's prom dresses for guests to wear on the night or ask them to buy & wear their own.
Wine Red Mermaid Prom Dresses 2017 Elegant Sweetheart Off Shoulder Lace Appliques Tulle Long Backless Burgundy Evening Gowns Sweep Train 80s Prom Dresses Aqua Prom Dresses From Bridalbuy001, $98.93| Dhgate.Com
In the 80's, this dress was to-die-for! Just imagine it with really big bangs and crimped hair. Oh yeah!
Purple Polka Dot Prom Dress, $88 | 35 Vintage Prom Dresses Under $100