Jimmy Akin in a post Marriages Not Made in Heaven notes an atheist dating service.
Well at least they won’t have rubbish like "soul mate" on that site. Which reminds me can atheists in good conscience listen to soul music?
Single man randomly generated from the primordial soup seeks woman also randomly generated from the primordial soup who shares the same disbeliefs.
In the presence of over-arching nothingness and these our friends I take thee to be my husband/wife, promising unto myself and the universe with no meaning to assert meaning and to be unto thee a loving and lack-of-faith-ful husband/wife in this institution created by humans so long as we both shall exist.
I think Freethinker’s Match needs a patron saint and so I nominate former atheist St. Teresa Benedicata of the Cross for them.