In theory, no. But we're all a little lazy. If you live at the CompanyX campus, surrounded by other CompanyXers, and have to drive a bit to get to the rest of the community, then people mostly won't do it. Maybe you'll mean to, but gradually you'd have busy or tired days here and there and not have time to do it, and you start to miss things and lose touch with people, and gradually the people and places closest and most convenient become your social circle. Maybe not for everybody and not right away, but it'll happen.
Spread those same CompanyXers around a larger community at random, and you get the opposite effect of them tending to form social groups more with people outside the company who do other things.
Spread those same CompanyXers around a larger community at random, and you get the opposite effect of them tending to form social groups more with people outside the company who do other things.