K-On!, New Game! Recommendations
Has a pretty similar feel, even music wise (same soundtrack composer). There are no boys either.
Do you like an amazingly written plot which actually moves forward very subtly and an outstanding cast of cute, all-female characters? Both K-On as well as New Game have this in store for you! Both animes are about an all-female cast having fun together, while subtly reaching a goal which doesn't seem obvious at the time but is revealed at the end. Just as in K-on, New Game has this awesome chemistry between all the characters, as they're all friends working towards the same goal. They eat and drink together, have fun together and work hard together. Both shows rely heavily on cuteness and comedy,
The series are both lighthearted comedies that feature cute girls doing cute things. Despite being slice of life anime, they both have a slowly advancing plot. In both shows, the main character joins a group of girls and they end up working towards a common goal. If you enjoy watching lighthearted anime with cute girls in them, you'll probably like both shows.