Depends on whom you are dealing with hotwives or Unicorns! I very rarely deal with single women or single Unicorns in the lifestyle because for me our arrangement always tries to go from NSA to a monogamous dating relationship so that's why I try to stay away from any single women period. 20 years ago I would have screwed half the women in my gym by now but I only mess with women in the lifestyle now for almost 15 years.
On AFF there are a lot of single women and when you read their profiles it seems like they should be on eHarmony or Match.com looking for an actual boyfriend or something. They get angry and hate to see single, hung, fit, black guys having sex with married women even though they are on a lifestyle site. They will even send me messages asking me why I ******* with married women or white women!
So if you actually want to be in a relationship with a single woman who believes that she is a freak with an above normal sex drive then AFF has plenty of them. You just have to be what they want!