There are a few. Problem is that most of us now work and such. Times that we play vary, and the time-zone differences for those that have migrated make things even harder.
There's my Steam page. That's where my gaming is at the moment - not too epic. These days it's mostly Alien Swarm or Magicka with my wife and two of our friends.
For the more hardcore stuff we're mostly into CS: Source but will play other things like UT as well.
IF it's console gaming you're looking for then:
For SF go to Kingston or Ochi
For SNK go to Kingston or Ochi
For Smash go to MoBay or Falmouth
For Bloody Roar go to MoBay
For MK go to MoBay or Ochi
For KI go to MoBay
For SC or Tekken go to MoBay or Old Harbour.
If you just want a basic challenge in something else then visit your nearest store really. If it's online gaming then add me and we can talk when I have free time.