I am just a lurker because I use flashrom to update my apu2 bios, so I am not going to attend anyway (even if it were at a convenient time EST).
However, if I were, then I would reject anything that requires a Google account (or even worse, a facebook account), and also reject anything that requires installing proprietary software.
I suggest looking at jitsi meet, and there are multiple public servers for it besides meet.jit.si. One is calyx.meet.net. FSF associate members can use the FSF instance. It can be self-hosted pretty easily if you have a GNU/Linux server.
I gather there is Big Blue Button too, but I have never tried to use it.