it Appears to be where you live according to this forum as to the club's you come into contact with. All the clubs in my area are really friendly, even to a point where inter club banter goes on at the coffee stops.
Either that or some of you are a little touchy.
You got to remember that some clubs don't have club run's and just sunday Chain gangs. If your going to ride with a club it's worth checking out if they do cater for newer riders and if they have more than one group of riders on the club run. We have 3 lots of riders on our club runs to cater for different sorts of riders, we have the hard riders, who, in general arn't that hard, we have the easy riders, which is mainly made up of old boys (over 65's) and then the womens run, all who meet at different times at at different places, but all on a sunday and all meet at the same cafe stop. I wouldn't get put off by one run, try other clubs, check websites for details etc, if you ask the right questions you should get the right answers.