All Hallows’ Eve Brew Ha Ha

John Harvard’s Brewery & Ale House will host a night of horror, complete with festive sips, Halloween-inspired treats, and a costume contest. Dance the night away doing your best “Monster Mash” and enter to win a $100 gift card to John Harvard’s for best costume.

Oct. 31, 8 p.m. John Harvard’s Brewery & Ale House, 33 Dunster St., Cambridge. johnharvards.com