I went to one in Britain. It was one of the most funny experiences I have ever had. I went with three Friends of mine.
Well, The food was not the best, but the maid we had was a lovely girl. We talked for ages about Danganronpa, which annoyed my friends because they found it awkward
Anyway, one of my friends was sat there looking really awkward, and one of the other maids in cat ears saw him, so as a joke she went over to him and purred. He stood up and just said no and walked out
All I can say, Is that i am now good friends with Sharon and Elizabeth. They are the only people I know IRl who actually like anime stuff :-P