hell yea, i've done it a couple of times. I'd rather be at a club alone having fun then sitting at home thinking 'damn i wish i could have got someone to come with me'. It depends on the night though, if its a night where pulling is the aim or whatever, then i wouldn't want to go alone to that [eg student nights], but if its a place where its all about the music, it doesn't matter if you just lay back and enjoy it. When i'm out i dont consider 'i wander who this person is with' unless they are being proper weird and i'd want to hint for themto go away, but that doesn't really happen. Anyone who thinks its 'sad', well, i'm sad you're so insecure you cant do things without a friend holding your hand. Sure, its better with friends but sometimes that isn't possible!