Ah. You seemed to be looking for a very specific answer, but without further details, it's hard to know for certain.
It's come to my understanding that most humans - and aliens, for that matter - do partake in certain activities after work that fosters camaraderie. My friends in the 21st century in particular, were prone to going to a local alien-friendly bar in National City, and it seems that J'onn has found the new love of his life and most of his current clientele in that bar.