lol really? I played WoW a lot, mainly with friends, but I used to talk with raidCall, and set some dinners etc lol it was a nice group, and they were not under ten. That is really not the average age for WoW, maybe you got "unlucky" lol
I can't see where WoW is related to Op's topic about RPG bitcoin gambling though.
It relates because what op is looking for is not available on any big scale. WOW has a internal currency that we could copy to set up a bitcoin game. When players go into a tavern they trade, gamble or exchange btc.