He does kind of have that look in his eye...right before he hit the glass and scared a few visitors. Not so happy about the reflection in the glass but hey...what cha going to do. ^_^
Had to do a little research into the species since there are no apes in the bar and apes are not monkeys. I think he is a silver-back gorilla.
Link
Folji
Yeah, that's definitely a silverback, and he looks pissed!