He was old, early 80s (since retired and passed on) and said he had been asking his patients that his whole career, and had been keeping track.
I met my wife at a bar. Now, this was pre-smart-phone era, I will grant you that.
He said that a little more than 80% of his patients met their spouse at a bar. He said every time he heard someone say "You need to go to church", "you need to volunteer", or any other thing like that, he would interject that no, you need to go out drinking and carousing with friends. And always with friends. Apparently, out drinking and carousing alone is not nearly as effective.
You will have to accept the word of dead physician from the 1990s on that. Post 2008, the numbers have likely shifted.
But I still recommend drinking and carousing with friends. (That doesn't mean heavy drinking, you don't have to get plastered to carouse)