Grandad It is dificult to interest men in joining /gransnet, possibly becasue of the name, but even without mentioning that, they seem resistant to chatting on sites unless it is about cars or suchlike.
I have tried describing Gransnet to male friends, emphasising the way people discuss all kinds of subjects, sometimes vehemently, but the moment they hear that it is for people over 50, mostly with grandchildren, they shy away, saying something like, "I don't want to hear people going on about their wonderful grandchildren." There is some sort of filter, which doesn't hear anything except "grandchildren"
Some of those who do join have a rather strange concept of what a social network site for the over-50s is for - they treat it as a dating site, clearly having only one use in mind for women!