I don't know if this has been asked but I'm looking funny situational stories where either someone is ignorantly put into weird circumstances or someone shows up to create the circumstance.
for example ones like:
Hajimete no Aku
Kaibutsu Oujo
Nagasarete Airantou
Beelzebub
xxxHolic

I'd say Yotsubato! even if it's quite different from what you listed because the situations are very ordinaty, it's just Yotsuba who makes them weird. But it's so good I can't mention it.
Probably more similar to what you are asking for are 2x2=Shinobuden, Bobobo-bo Bo-bobo, GTO, Saint Oniisan and to a limited extent Mahoraba.

What I like in Trivial Pursuit style. Pick your category:[img]http://i379.photobucket.com/albums/oo233/Reid4891/Manga/trivia-1.jpg[/img]

Angel Densetsu

This is my Siggie.