Place votives on some or all of the tables to give the room a romantic feel as the lights are dimmed throughout the evening. The candles will also be a nice touch for all the pictures taken. Scented candles are a nice option as well.
Placing baskets filled with inexpensive items in restrooms at facilities adds a nice touch. Fill them with mints, mouthwash, nail files, lint rollers, hairspray, etc.