For simple dessert ideas, check out Costco for their cheesecakes that come frozen and already cut. Also the profiteroles. Another easy dessert but totally decadent is a chocolate fondue with large strawberries for dipping. Use wooden skewers to dip - cheap and disposable. All you need is a microwave to heat up the chocolate/cream mixture. You can also dip the profiteroles. Have several dessert stations set up around the room to avoid congestion.