Take the teenaged cast and episodic nature of the old "Archie" comics, strain them through some "Comedy of Manners" novels (I'm thinking of Kushner's Swordspoint and Privilege of the Sword, and Wrede and Stevermer's Sorcery and Cecelia, but their common ancestors, the works of Jane Austen, would probably be even better), add a dash of "Whose Line Is It Anyway?" and a generous helping of the showiest, wooziest aspects of modern Japanese life. Beat until very, very light and fluffy ... and maybe you'd come up with Ouran High School Host Club.
I actually enjoyed this quite a lot, which is extremely strange, because it has very little in common with the other manga I really love.( Read more ... with spoilers! )