It's really a spectrum, of course... But to pick one and only one option, I'm going for "strangers." I see most of the gaming group for game and only for game. On occasion, we might have lunch or go out drinking or something, but that's pretty uncommon. We share very few interests, if any, outside of gaming. I can't really discuss literature, cooking, or my work with them, and they can't really discuss anime, video games, or their family situations with me. So we play Pathfinder together and leave it at that.
I hesitate to say "sociable" because I don't always enjoy having everyone at my table there, and even so, most everyone does something that gets on my nerves every once in a while. Still, I'm willing to work to see eye-to-eye with people and the serious offenders are asked to leave, so I'm left with a group that ranges from so-so to good.
It's not an ideal group or situation... But when the choice is between decent players that I can game with versus no game whatsoever, I'll take the decent players.