I have found that it’s essentially unpredictable whether I will enjoy a particular social gathering - even on recurring events (group hikes, local party committee after-session drinks, Stammtisches) I go home recharged and in a good mood the one time, drained and miserable the next time.
I cannot interact with particularly large groups but such a group tends to split off into smaller groups that can have a conversation, and I can with some luck insinuate myself into one.
With given main parameters of the gathering, I have found that just one or two people can make or break my experience.
People who have single-handedly made the occasion enjoyable for me
[ul]
[li]Some people do practice the simple, obvious courtesies that should be obvious but, alas, are not. For example, when you are sitting together with people whom you know but who do not know each other, introduce them to each other (I, being an introvert and knowing the problem, make a point of it myself). Also, when you talk to someone and someone else stands by with an obviously interested posture, include him/her in.[/li][li]Some few other people even go further and make it their business to actively introduce people to each other, making them circulate and starting conversations in which they are not a major participant themselves. I have seen guests do that when the actual host chatted with a small ingroup the whole evening.[/li][/ul]
People who have single-handedly made the occasion miserable for me
[ul]
[li]People who are not aware that in a conversation between n people they should expect to shut up for (n-1)/n * 100 % of the time. People who drown out other’s conversation, talk over other people, generally monopolize the conversation. (Ironically these antisocial people are considered sociable, aren’t they?)[/li][/ul]
Some other unpredictable circumstances that can make (+) or break (-) an occasion for me:
[ul]
[li]- LOUD volume of conversation (this makes me silent because I feel responsible in part for the overall volume, so I’d contribute anti-conversation, if I could, to bring the level down to normal).[/li][li]- LOUD GUFFAWS, ALL THE TIME (usually alcohol-fueled), drowning everything out in the vicinity[/li][li]- being the odd man out in a group that otherwise is very familiar with each other[/li][li]- loud music that makes conversation without shouting impossible.[/li][li]+ a large enough ‘seed’ of people whom I know well - I have found that given that it is easier to reach out to others[/li][li]+ having some sort of standing in the group myself[/li][/ul]
So I usually go to a social gathering looking forward to a chance of a enjoyable evening but aware that it may well turn out the other way this time.