Fab Swingers has some problems last week, there was basically a huge amount of new people going to the site with traffic doubling over two weeks! Unfortunately the server that the site was on didn't really cope and at peak times the site was unusably slow. The site has now been shifted over to a much more powerful server and it working fine now.
The new server was quite expensive but the site is still completely free. The advertisers pay more when there is more traffic so the sudden rush in new users has generated more cash which has covered the cost of the new server.