WATERVILLE — The Mid-Maine Chamber of Commerce will hold its Business After Hours event from 5:30 to 7 tonight at T&B’s Outback Tavern, 6 Jefferson St. The event is an opportunity to mingle with other business professionals and leaders. Hors d’oeuvres and beverages will be available, as well as a 50/50 raffle and door prizes donated by area businesses. For more information, call 877-0087.