There are three games that I know of. All are 3.5 DnD.
The first two I play/DM in.
Saturday - Plays off 290 on every other Saturday (there is a game this Saturday). Currently they are in the middle of RttTOEE. Average party level is 8th right now. Fairly well rounded group. I DM in this one. Start time is around 11:30AM and we tend to wrap up by 6:00PM (with few and rare exceptions)
Friday - Plays off Shepperd and W. Gray on every other Friday opposite the Sat game above (so next game for it is March 21). Similar in level. Playing in a custom campaign world loosely based on the Warhammer world. 3.5 DnD though. I think the average party level in that one is around 8 as well. I play in this one. Start time is around 7:00PM and we tend to wrap up by 2:00AM (with few exceptions). Most of us meet for dinner before the game.
This next group I know about because one of the players in the above 2 is the DM for it. The above two are relatively low magic, tactical games. There's roleplaying in both, but I'd call them more classic. The saturday game is a *lot* of role playing. Like I've seen those player "roleplay" being in a bar for 3+ hours of game time.
Saturday - Plays in Missouri City on the same weekend as the Friday game. I don't know much about the group, including times they play but I think it's from 6PM-2AM and they tend to go get dinner as a group.
If you are interested in any more information, PM me (if I can get PM's, not sure) or email me at prospero63 [at] comcast [dot] net.