I used to do the same thing!!! I used to be very heavily involved in an on-line game called, "Tribes" and "Tribes2". Myself and a couple of my friends would organize LAN parties a couple of times a year. We would rent a local day care for the weekend, start playing on Friday night and clean up by 6 or so on Sunday evening. We would have people fly in from around the country just to spend the weekend gaming.
Here are a couple shots from one of the last ones that I was at...
As your son gets older, this is the kind of stuff you can look forward to.
BTW - this was in 2002, thus the lack of flat panels displayed. There's still about 10-15 systems in the room that are not in either of these pics.