Music venue promotion

We need help to promote a new music venue in Fulham, London SW6. We have a bar/cafe called Emporio Sao Paulo and have just introduced live Latin American music. Our model is to be like the 606 Club. We need help to promote the venue, through listings sites, facebook/twitter etc, but what would really help is to be able to reach key audiences directly.

Experience and ideas are essential.

We can either pay an hourly rate or commission. Commission is preferred - maybe a fixed price for each person that books as a result of your efforts.