The last place I worked (<15 employees) had an informal team-building policy involving foosball. I learned about it when we were hiring a software developer. I was told (by the VP of Eng) that they asked every candidate about foosball. I laughed, and he said (quite seriously) that foosball was an important for team-building and that not playing would make it hard to bond with "the team." He never, ever asked any of the women to play. The QA guys were invited, but not the women. The customer and sales guys were invited, but not the women. So the message there was that we didn't seem to be part of the team in this guy's eyes.
I'm vocal and did pretty well at that job, but that message was pretty clear. And given how important that game seemed to be for "team building," it seemed pretty rude to me.
Obviously, we could have said, "Hey, you should let us play too!" but the game wasn't the point. The attitude was, and it came from inside that VP. The other guys were all actually pretty cool to work with, but they weren't making the decisions.
