Two groups, both D&D 3.5, and I'm DM for both. My main group is at the climax of Red Hand of Doom right now, and usually meets once a month. They would like to meet more often, but I don't enjoy playing with them due to one particular player (who is friends with most of the group) that argues constantly and has been ruining the game for me. As soon as we're through with Red Hand, I'm ending that group.
I started my other group so I could play without having that one particular guy at the table. I've been having so much fun with them that I've been getting everyone to meet weekly.
So, two groups. Hopefully soon, one group.