Bar
Gabe was working his way around the party - but the bar was conveniently located so that he could keep his drink filled regularly even without looking like a complete barfly. But if he maintained a low buzz, he was less likely to be disturbed by visions. He wouldn't be so dulled though as to be unable to warn someone to stay out of the water if necessary.
Since this was a wizard party, he wore a short sleeved white t-shirt, letting his wand holster be visible on his arm. In jeans, he was barefoot in case he was thrown in the pool at some point during the party.
"Umbrella drink. Feeling girly today?" Gabe teased the Gryffindor metamorph. He went behind the bar to refill his cup from the tap himself.