When you host an event on Splash, I always recommend customizing your RSVP form. That way, you can ask every guest for their social handles, like Twitter and Instagram. Here's how that little piece of data can help your event numbers:
Looking at your guests’ social feeds (and their follower counts) can help you pinpoint influencers before your event. The goal is to create a relationship with these guys before your event. We've found that pre-engaged guests are much more likely to post and share once they're in the room.
So, make sure to follow any interesting guests (e.g., guests with more than 500 followers). Then, reach out your “influencers” with fun, targeted messages. You might consider DM'ing insider tips about the event ("Check in at the side entrance; we'll get you right in."), or publicly expressing your excitement ("Can't wait to see ya!"). We call these a "digital high-fives."