I hit up most of the bigger party hostels in Central America recently. Never solo (I'd always have a few younger friends to help me blend in). Out partied those younger friends consistently.Thou funny thing about the party scene. Had a night out at the pub last time and the joint was locked. Someone was still in the kitchen (was near the front door) and let me back in. I out partied them.
Which of course probably made me stand out as 'the creepy old guy in the hostel' more.