So how many girls can you invite to the Maid Cafe? Because so far I've only gotten four and it won't let me invite anymore.
There are a total of 12 you can invite. If you give business cards to uninvitable people too many times eventually you run out, but Gemini at the Maid Cafe can sell you more. If you never give them to wrong people you should never run out (listen for the bell ringing sound before you give someone a card. For Cleo make sure you tip her first before giving her a card.)