Is this being antisocial?

[T55y66]

I do a hobby with others every Saturday. Out of the group, maybe a third might go for a brew/drink afterwards. We've spent a full day together. I don't always go for a drink as sometimes I've something on/ have things to do at home/ more often than not I just want to get home as I've spent all day with these folk, nice and all as they are, and I've nothing more to say to them.

So, others go always, some never go and I go sometimes. Someone who'd never miss the drink or coffee afterwards has said some of us are antisocial. Are we?

YABU - I'm antisocial and should go on every occasion.
YANBU - I've spent all day with these people already, enjoyed their company, but occasionally want to leave straight after and that's okay.

It’s fine. My gym group can sit for 2 hours after classes, lingering over coffee. I rarely join them, I have better things to do. They’re perfectly nice, but rather boring.

What’s the hobby, OP?

I don’t think you’re being antisocial from what you’ve said.

Everybody is different. Everybody has their own commitments and reasons for not joining the socialising.

To label members of the group as anti social because they don't , or rarely , join in the socialising is just plain unpleasant.
And sounds like someone who wants to create divisions in the group.

I think they actually mean unsociable rather than antisocial.

If you were unsocial you wouldn't even join in the hobby that includes other people.

They are talking nonsense. Some people will always find fault with others who enjoy things differently to them.

Good to know I'm not being unreasonable. I'm fairly introverted, have no problem chatting to anyone, but I reach a limit, and sometimes a full day chatting and making small talk, and I've had enough and need to escape. Not always, as I said...I do often make the effort

Well some of them might be. But that’s fine. It seems to me that generally speaking people are becoming more accepting of other people’s differences. Because of ND, energy levels, competing commitments and other reasons plenty of people do not like socialising in large or even small groups. And there’s nothing wrong with that as long as they are happy without it.

Not unreasonable at all. I'm in a running club, a gang usually go for teas afterwards. Sometimes I join them, sometimes I don't feel like it. Suit yourself. No one is right or wrong or anti social... just personal preferences

Yes, I sometimes feel I'm in the wrong if I don't go. Others don't go and don't care what anyone else thinks!