People who are members (you need to be invited, or ask to join, which I think is a little shallow...) upload their photo and add where they bought their outfit pieces from. You can then 'hype' the looks you like, which puts them on the leader board.
Men and women all over the world upload pictures onto lookbook; it's a great place to find inspiration for any upcoming event like a date, a day trip in the city or even for popping over to your corner shop. Here are some of my favourite looks:
Check out the website for yourself: www.lookbook.nu