I'm not exactly sure why I'm replying to this, but here goes.
Asking about the 'old members' ... I used to play Magic The Gathering (card game). My friends and I never could find a good place to play so one day I suggested the public library. They had large meeting rooms that seemed to always be available. So the four of us regularly met up there and played for hours. Eventually other kids caught wind of it and started coming. Then, finally discusted by the "n00bs", my friends and I ventured off to new places.
You see, people get tired of putting up with the hastle of re-explaining everything ten times a day. Or just the general change in atmostsphere caused by new personalities that they don't necessarily jive with. Eventually the old group moves on. Tired of the hobby, tired of the new people, tired of the hastle.
Or maybe they all got hit by a bus!