I certainly used to, and I'm sure I would do again if I didn't avoid those situations like the plague. Sometimes I'm still unlucky enough to get stuck with two or more people who can't be bothered to include me in their conversation. I don't have any perfect solutions. I might just stay quiet, I might try to look like I'm part of it without actually being part of it, I might try waiting for a good point to try and contribute, I might try to think of a way of escaping without too much risk of them wondering what's "wrong" with me. I might try to splinter an individual off and go into a one-on-one with them.
It depends on the people and the subject matter. Some folks are more inclusive than others. Sometimes we know each other quite well, some folks are more on my wavelength than others. Or it might be a bunch of strangers (in which case anything could happen, probably nothing good but you never know), or it might be something in between. Some subjects are mutually interesting enough for it to be reasonably easy to join in. And it's not always a "let's exclude ToughDiamond" exercise from start to end, it can move around, so that it's like that at times but with more accessible phases here and there.
It also depends on me. If I'm not careful I can start talking at such length that people are bound to find it too much. I can also say unpopular things and so alienate myself, because I don't always quite know what they find acceptable and what they don't. A group is a complex thing and everybody in it could have their own particular set of preferences about what they want to hear.
But mostly I just try to keep away from group conversations. I get my "communication fix" with one-on-one conversations and with online stuff or emails, and I don't really need anything else. In some ways I barely acknowledge that society exists. I more see the world as a lot of individuals, each one with their own personality, interests, goals and preferences. Non-attendance at social gatherings isn't a bar to a social life, and if some people think that's antisocial, well they'll just have to live with it. With a bit of luck they'll take a dislike to me and stay out of my way.
When I was working, I was lucky to live near enough to home to go back there at lunch times, which got me out of a lot of the group social stuff, and I was also lucky that my lunch break wasn't one of these short modern things - most days I got an hour, often a bit more. The job I had before that was too far away to do that, but mostly I got on well enough with the other people to keep my head above water. It was a fairly small place. I didn't do enough college for it to be much of a problem, just one day a week for a few years. At school I'd usually find an outlier to hang about with rather than waste my time trying to run with the pack. Big family gatherings were few and far between, and I opted out of those mostly. To this day I rarely see most of my relatives, and know very little about them.