FlirtFix is a UK oriented site that's created for people seeking fun flirty encounters rather than something deep and meaningful. There's a premium membership which allows full access including emailing. The site only has around 1,000 active users.
You can get a 30 day free membership to try it out. This free membership is being offered for a limited time because the site is so new.
You'll be able to chat, send messages and flirts, and search for exactly the type of single person you'd like to meet. You'll answer lots of questions to help the system find the right matches, and you'll know right up front what other members are looking for in a relationship.
Once free membership is done, it appears that you'll buy credits rather than a paid membership. Credits are used to contact other members on the site.
The features appear to be ok, but since it is a small site, there are not a lot of members to choose from.