I think the anime you are talking about is Happiness
The anime series "School Days" has 12 episodes .
Never. Thet are not planning to put it in anime
if what you are looking for is a funny anime show: school rumble^its AMAZING!!
Anime and Manga: Gakuen Mokushiroku: High School Of The Dead
Yes there is some, but the anime is not really focused in ballet. But the setting is in a ballet school. The name for this anime is Princess Tutu.
Since this question is in the anime and cartoons section, I take it you mean anime/manga after school clubs. I think theres no particular answer to this, but In my opinion, I think they have after school clubs for fun!Especially anime/manga clubs, since you get to do something you really like and enjoy doing.
High School of the Dead
Possibly "School Days".
Nichijou.
School Rumble
Yes
High School of the Dead