-Make your dinner feel more formal without increasing the price; have the caterers circulate during dinner offering your guests fresh grated Parmesan and/or pepper (works for either a buffet or plated dinner.)
-Give your guests their caffeine fix without them having to stop at Starbucks! Have an on-site espresso bar serving lattes and mochas!
-Have an "appetizers only" reception. You can serve a mix of fun hot and cold hors d'oeuvres. (Make sure to indicate this on your invitation as you don't want your guests expecting a full meal.
-Other fun trendy ideas include a sundae bar, a movie theatre popcorn machine, or cotton candy!