I always found, when out on my own, it was best to just go and make friends with people. Have quick chats, crack a couple of jokes, just talk to some people and enjoy yourself. Going out, on your own, with the express purpose of picking up women, is a bit wierd. Don't put too much pressure on the interactions. By having the confidence to just go and chat to people and make friends, you'll find women taking an interest in you.