These bitches are crazy! But damn, I love them. It's a shame Ai can't live with having just Hina; some people don't even have that!
I can't wait for when it comes out that glasses girl is the one who leaked all the pictures to everyone.
The Takarazuka Revue is a famous Japanese theater group. It's known for being all-female, with women playing any male roles in the story they're putting on.
Comparing a girl to one is a way of saying that they would look good in men's clothes/a male role.
Rather than needing context, I actually think it's just a silly standalone joke. Yuuki thinks Sayaka is dressing in a promiscuous manner to answer the door and seduce a Yamato driver (think Japanese UPS). So Yuuki decides to test it out by dressing up in their uniform and showing up at the door...
@Simpleton
I certainly hope they actually screwed! I'm just always worried about bait-and-switches in scenarios like this. Like we'll all enjoy knowing that they finally got it on, but then next chapter we find out that they were too nervous to keep going, or something.