9. Make Them Public—In a Big Way

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.
Photo: Courtesy of Twitter
4. Provide a Memento

Services like Instaprint are popping up at many affairs, proving popular with guests as a tangible record of their active social media use. At a fashion show held by USA Network in New York, even the wall the machines were mounted on sported the hashtag, motivating curious attendees to snap a photo and post it via Instagram.
Photo: David X Prutting/BFAnyc.com
15. Put It Where Guests Gather

Bars are almost always the most crowded areas of an event, and in addition to displaying the affair's signature cocktails, drink menus can be marked with a hashtag.
Photo: Anna Sekula/BizBash