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Thanks all - I have all the 'non-Facebook' advertising angles covered, it was simply the Facebook aspect that I needed some with - but thanks again all for your supportive suggestions and kind words.
Eddie - I know that good DJ's get repeat business, and often one gig leads to another, I have enjoyed that experience before, I have just been out of the loop for a number of years, but am leaping back in again!
I remember doing an 18th birthday party in a pub, and when I was setting up, the landlord was giving me earache about playing the right music, and not being too loud. When I was packing up, he offered me a weekend residency!!