[WillowTheWhisp]

Ah so it wasn't a suggestion, it was an observation. Perhaps he has observed that by and large people do tend to congregate in groups with those of a similar ilk. He defined it as colour from personal observation whereas you define it as people having similar interests from personal experience. I would probably congregate with people I had shared interests with too. It is equally likely to work with age-groups. This afternoon at church us old fogies were having a chat at one end of the corridor and a group of teenagers were having a chat at the other end of the same corridor. Neither group actively excluding the other but simply homing in on people we had something to say to due to similar interests/situations etc.