Enroll in local educational opportunities that interest you (usually towns mail out flyers periodically with the info). Volunteer your time at charitable organizations. Depending on your industry you could look into chamber of commerce events (Bangor has a chamber offshoot that caters specifically to young professionals and has periodic social events and recreational sports leagues). Look into the eSports scene as there are a few local organizations trying to get off the ground. Start going to local tcg shops for events that interest you (DnD, Warhammer, MTG, etc..)