Yes, I currently live at home. We have 3 computers set up in the same room with a household network. My father, stepmother, and I all maintain our own seperate accounts for a few MMORPGs and actually play them together with some frequency, heading out as a team.
Generally speaking they aren't very good at it (Lol) but they are pretty into at times. They also play other games, but are mostly into MMORPGS right now, even when I'm not there (or when I'm raiding, which they are not really into despite the fact that my stepmother did it in EQ) they seem to spend a lot of their free time playing online together.