The ponytail and pigtails looked very nice on Mio. She and Azusa look a lot alike if they wear their hair in a similar fashion (not that we didn't already know that).
Yui and Mugi in swimsuit. I'll remember that scene for a long time.
Too bad the rest didn't join in (though Mio would probably die of embarrassment if she tried).
Much Ritsu abuse in this episode (though totally deserved nonetheless). Speaking of Ritsu, some club president she is.
Will we ever get to see what Mugi's mansion looks like?