I work downtown and so do most of my friends either from law school or former jobs. We meet up for lunch in one-on-one settings frequently. Chat about work, life, shoot the shit, whatever. Similarly, once every couple weeks I plan to meet up with people sometimes only one other person can come (most of my friends in this area/former co-workers are female). My girlfriend doesn't work downtown so she wouldn't come downtown just to meet us.
On the flip side, my girlfriend works in a heavily male-dominated industry and frequently gets lunch, dinner, or drinks with male co-workers. Hell twice this week she went out to dinner with a male just the two of them - one a former coworker, one a mentor type.
I'm not judging anyone, but I'm definitely with Louis Gossett - had no idea this was a thing at all. I mean this is absolutely wild. Makes me wonder what other stuff people do that I have no idea about.