I’m going to preface this by saying that I barely go out these days and have really never found a connection with the local electronic music scene, but these are some local options I’m aware of.
Content Brakes has been organizing events at O’Brien’s with some regularity. The Infra crew hosts touring techno DJs and locals at Lower Level, The Phoenix Landing, and other locations. You could try to connect with the local Modular on the Spot folks if that’s your jam. Corrosion Boston was a monthly industrial/EBM night at Brighton Music Hall pre-pandemic, and it appears they are trying to make a comeback next month. Xmortis also caters to the goth/industrial crowd and is still going strong at The Middle East. If you like drum & bass there is Elements at The Phoenix Landing every Thursday. If you’re willing to travel, Mayday in Providence, RI also hosts a lot of electronic shows.
Obviously some of these are club nights rather than live performance venues, but if you’re looking to make some connections in one scene or another they’ll give you a head start.
There is also a Boston events thread on Lines, but it’s not particularly active.