'Those Who Can't' is a fantastic adult sitcom in the vein of 'It's Always Sunny In Philadelphia'. Its first season takes several episodes to get going, so stick with it (and probably watches better now that we've grown more familiar with the characters); the show improves noticeably during its first season for every successive episode.
Season two has been, thusfar, home-runs completely; the episodes are consistently funny, ranking all among the show's best; the show is clearly stretching out plot-wise, and all the actors have become much more comfortable (looking at you, Adam). Big props for (taking a page from IASIP) not sidelining Maria Thayer.
Recommended if you're looking for a dark comedy fix. Give it a chance!