Fan Expo Boston 2019 We attended the Fan Expo Boston on Friday, 16 August 2019 at the Boston Convention and Exhibition Center. The three-day event was more celebrity-driven than some of the other Massachusetts affairs, since it is a larger event. Some photos: The webmaster (right) with his friend, Casey. Our friend, Batman cosplayer extraordinaire, Matches Malone (above and below). Batgirl and Harley Quinn! Batgirl and Batman!