UK Disco was the first place I took out a paid listing with when I first started up. I had a few bookings from it but it was early days for me and I was charging less.
The site is still in my favourites list on my laptop and every now and then I will take a look to see if there is anything there but there never is.
I haven't paid for a listing there for probably 4 years now.
The one positive I can give though is that of the 10 or so bookings that I had via UK Disco, a number of them booked me again for other functions away from the site and one customer in particular has proved to be a diamond. They book me every year for their summer function which is well paid and the original booking that came via UK Disco the first time was at a venue out of town that I had never been to before and I ended up being their recommended supplier.