Parties are... not particularly Tseng's favorite activity. No, he's not as stuck up as everyone supposes he is, and he lets loose in his own ways now and then. But he'd been urged to at least make an appearance, so there you have him. The Turk had stationed himself at a high table off to the side near the center of a wall so he could see everything and react quickly should anything arise.

Off duty didn't mean off his guard.

That said, he had a half-finished glass of whiskey in hand, his third actually, so it wasn't as though he wasn't allowing himself a vice here or there. Polite smiles are sent in the direction of anyone whose gaze lingers too long, trying to dispel the idea that Turks are capable of killing with a glance and are prone to doing so constantly. Honestly, it isn't going well, and most would rather avoid looking at Tseng at all, let alone go anywhere near him. For the most part, this suits him just fine.