If I am in a group, say, of 5 or 6 people, I'm going to hug all of them or none of them (if they're coming to me for hugs). I am not usually a touchy/feely person, but I would hate to be the one person left off of someone's "hug list" during such an occurrence, I wouldn't think that person had boundary issues, having seen her/him hug everyone else in the group; I'd think they just really didn't like me.
You're absolutely right -- it would be notable in a group that small (although the truth this that I *don't* like some people). However, in a situation like tonight's dinner, there will be at least 30 people there, if not more, some of whom I barely know. Surely not everyone hugs everyone else when there's that many people. (Or, perhaps what I mean is, surely it's not *expected* that everyone hug everyone else, given the varying levels of knowing/not-knowing people.)
I often look like a jackass by comparison because The Boy accepts hugs from everyone who flings themselves at him with outstretched arms.
t edit And my boundary issues exist w/r/t other people -- I'm more comfortable with some people than others. I can't help being uncomfortable with, for instance Creepy Eyefucky Inappropriate Comment Guy, or Thinks It's Okay To Give Unasked-For Massages Guy. Them I don't want to hug -- their standard of behavior crosses my boundaries before hugs ever enter the equation. People who DON'T comment on my boobs out of the blue and who DON'T tell me they'd like to fuck my boyfriend are generally not violating my boundaries and therefore are welcome to a hug.