MASS AVE PUB (map) 745 Massachusetts Avenue Indianapolis, IN, 46204 United States ✚ gCal ✚ iCal MASS AVE PUB FLAT12 TRIVIA NIGHTEVERY WEDNESDAY | FREE | 8:30PMJoin us every Wednesday at Mass Ave Pub for Flat12 trivia night. Each week will feature a new Flat12 pint special. #TheMoreYouKnow