For us both works. Sometimes we enjoy realling getting to know people first through meeting and talking on line and other times we may have just met someone at a club and there's that instant chemistry there and sparks fly and things happen. In the latter cases sometimes those develop into friendships, sometimes they don't.
It's not necessarily about being bedpost notchers, it's just the way it works out sometimes.
You may want to check this topic as it is discussing basically the same question:
Friends as Swingers versus Sex Only Swingers