Is there anything that K-ON! don't do? They even make over one of the Anime, Working!!
Leave Working!! alone! K-ON! (I can't believe how many ! I uses for this sentence.) LOL
For those who don't know about Working! the anime, it is way interesting than K-ON! in my own opinion. :)
Here's the original Working!! anime Opening.
Personally I like Working!! more than K-ON! as it is more interesting and funny. If you want to know more about Working!! anime, you can read kluxorious blog about it.