The community model is this year's hot topic in the event industry, with planners utilizing year-round engagement to build support for their events. It's a great concept, and one that might work for your next event, too!: https://helloendless.com/how-to-promote-events-without-social-media/
How to promote events without social media? Well, it's hard, but not impossible. The Brew Crew bets on attendee retention and community.