probably not what you want to hear but for me it's tiny telegram groups of close friends, because honestly the bigger group scene either fills with oddballs (not the good kind) or just general discourse that I'm always playing catchup with because I'm generally busy or sleeping when they're in full flow, which quickly becomes a chore

Bigger groups kinda push me into lurking or getting scattered to deal with the massive amounts of conversation going on, so I participate more in closer groupings with a few friends. Not sure if this helps, but I'm responding in case it does. =X

hmm, i personally havent seen a lot of activity in groups on any of the major furry art-sites, seems like most socialise on twitter, telegram and discord these days, im more of a small-group of friends kind of fox lately and even that im not as active as i probably should be XD

sorry i couldnt be of more help :/