I believe that a subforum or area for tabletop gaming - D&D, World of Darkness, wargaming, board games, etc. - would be a great idea. People have done successful LPs of this stuff, podcasts like Six Feats Under, and gaming streams. However, they’re definitely not traditional LPs, either screenshot or video, and discussion of them might get confusing if they’re just in the general game chat stuff. Play-by-post games are also a definite possibility but I don’t know that they’d necessarily all be fit for the general LP stuff since those are…not traditional, again, since many posters would be involved with them. So, again, it might be confusing.
Or not! Maybe it won’t. But either way, I think a subforum is a good idea.