gala

If your event has an oversize prop, eye-catching decor piece, or some other feature guests are likely to want to photograph, that element is a smart place for a hashtag—and it's bound to make its way online throughout the night. For instance, a Los Angeles event for British Airways and Variety saw hashtags splashed in the front windshields of traditional British black cars. Similarly, Diesel printed the hashtag for its Reboot campaign last September on large-scale installations in New York's Union Square.

Hashtags printed on items that guests hold in their hands throughout the course of an event—say, a fan giveaway at a promotion, or a table card for a seated meal—cannot be easily ignored or forgotten. At Essence magazine's Black Women in Hollywood Oscar luncheon in Beverly Hills, hashtags and handles decked seating cards for easy reference.

Sure, promoting hashtags within the boundaries of an event can get guests interacting. But put them outside the event's official walls and you're more likely to capture a bigger crowd. At the Cannes Lions International Festival of Creativity, a 3-D projection of tweets using the official event hashtag appeared on a 35- by 65-foot billboard. The digital activation, created by Incredible Machines, ran at night, while during the day the billboard showed a static image of the hashtag printed on canvas. Similarly, AOL placed its hashtag on a giant billboard outside the venue of its upfront event during Advertising Week in New York.

Putting hashtags on food isn't just a tasty idea—it's Instagram bait to boot. An event invitation to the Time Warner Cable Studios pop-up in New York before the Super Bowl came with a hashtag printed right on top of a cake.

This table at Toronto's Canadian Film Centre gala is beautiful, yes. But I'd be worried placing my cocktail, glasses, and notebook.

Looking to boost event-day proceeds, Miami Children’s Hospital Foundation eschewed the basic silent auction setup of placing the prizes on a table, instead enlisting a group of hunky male volunteers to roam the crowd showcasing auction items on platters at its Wine, Women & Shoes benefit in February.