Here is another handy device that can help you find hidden cameras in hotels, restrooms, and anywhere else for that matter. The Scout uses LEDs that reflect off camera lenses. It can find CCTV cameras, phones, and any other spy camera.
To use the device, stand 5-15 feet from suspicious areas, turn on the LEDs and look through the aperture to find hidden cameras. This spy camera finder is available for under $100 at this time.