If you liked the K-On! anime, the Anime-Planet community thinks you'd like:
After her grandmother dies, thirteen year-old Kana Nakamachi runs away from home convinced her absent parents will sell her. She tries to find a job, but with nowhere willing to hire a girl of her age without parental consent, she is back at square one. Then, to make matters worse, a young girl called Yume crashes her bicycle into Kana and knocks her unconscious! Following this chance encounter, Kana learns of a job vacancy at the newspaper company that Yume works for and quickly applies. Now Kana has secured herself a live-in job delivering newspapers along with her new co-workers: lively Yume; quiet Yuki; drunken and perverted Haruka; money-hungry Hinata; and grade school deputy manager, Saki. From memorizing her paper route to learning how to ride a bicycle to fixing her terrifying smile, Kana’s new life has only just begun.
Both of these prominently feature teenage girls. Both are slice of life, with an anchor to keep the action going. K-on! has the Light Music Club, and Kanamemo has the newspaper. Both are comedy, have an upbeat and cheerful tone. K-on! contains more moe than kana. If you like one, I recommended watching the other.
First off this isn't a recommendation for the people who absolutoly love K-on! as their favorite show. This is for the people who like K-on! but admit that it isn't the greatest anime ever made. If you feel this way you should watch Loups=Garous, it is like K-on! but with a much deeper plot. Though both animes are very moé but in different ways. Also there's kind of a joke that the characters in Loups=Garous are in a band, and Kaduki looks kinda like Yui.
Everyday life may be full of mundane occurrences, but hidden amongst the banality, you can always find something fun to brighten your day. While schoolgirl Mio attempts to cheer up Yuuko after her horrific test score, Nano desperately tries in vain to get the stubborn Hakase to take her medicine. No matter the situation, these innocent girls can make the most of every situation, even by doing cartwheels at a deserted railway station.
Ouran High is a school for the extremely wealthy or, in Haruhi's case, the extremely talented. But no amount of talent will help when Haruhi accidentally drops an eight million yen vase in a music room. The vase was the property of Ouran High School Host Club, a group of attractive young men who, for a fee, provide their time and affections for their lovesick clientele: the female students. Fascinated by this strange new specimen, a poor and clumsy commoner, they force Haruhi to work for them until the debt is repaid; but they get a lot more than they bargained for...
Both OHSHC and K-On! are lighthearted series featuring high school clubs, and they both have plenty of comedic moments.
The characters are lovable in both series, and although there are differences between them (more of a romance element in Ouran than K-On!, different main character sexes), but they both have themes of friendship and school life.. and they're both super cute! ^.^