Here's an update: There will be a free concert and watch party for Game 1 at City Hall Plaza on Monday. NHL Will Host Bruins-Blues Game 1 Viewing Party At Boston’s City Hall Plaza Food trucks with food for purchase. Wine and beer. Opens at 4:30 PM, concert with TBA guest(s) at 6 PM. Viewing the game at 8. I'm not sure they'll replicate this for the other games, since Game 1 is the only game that's on a federal holiday - all the other games are work weekdays. Update to the update: It’s Lil Nas X (is that right? From memory) and some country guy who was on survivor.