Watching with friends
"aniwave watch2gether" is still searched, because the old site's shared rooms were how groups of friends watched a simulcast together. The same evening works now in three ways. In one room, cast from one phone to the television, the devices page explains how. In different homes, choose the same service from each person's Watch now list and start the episode together on a call; several services have a watch-party or group-viewing feature of their own, and the service's help page says whether it does. Or use a general watch-together browser extension that works with the service you all have.
Keeping the group in step
Each person's My List keeps their own place; the episode tables list every episode with its date, which settles "which one are we on" in a second.