Music festivals are also a great place to wear onesies, iron man costume you will be not only comfortable in onesies and also you can’t go wrong wearing onesies for a night out on the town. These onesies aren’t just for masquerade parties either! By doing so, this allows the maids to uphold a specific identity to their patrons and potential customers. Neko Café: Neko (ネコ, 猫) means cat in Japanese, and maids will wear cat tails and cat ears.