I'm sure it holds exhibitions of its member's work and internal courses etc, but any photography club of any size does that...
For anyone interested the RPS website can be found at:
http://www.rps.org/
As you say, Bob, it does hold exhibitions of members' work, some such as the International Projected Image on a national 'travelling' basis. The RPS is divided into regions which are thus able to attract some major figures to what are relatively local events.
In my admittedly limited experience of camera clubs (mainly from the point of view of judging competitions), they tend to be rather parochial and clique-ey with equipment snobbery high on the agenda. (I apologise in advance to those clubs that aren't guilty of such crimes!) The RPS as I see it doesn't go in for "print battles" (god, I hate that term) and their like, but takes a wider view of things and sees photography as something where its members work together rather than in competition with each other. Arguably, though, we are competing when we submit our efforts for selection in exhibitions.
Anyone in the US care to comment on the PSA? I know there are ties between the two organisations.
Best wishes,
Steve
(No, I don't have shares in the RPS ! )