Filming in a house of mirrors
One thing that you learn pretty quickly when you begin producing film or video, is that what looks right in a mirror in person usually doesn't look right to the camera. You end up having to place the mirrors at very different angles than you expect.

Fun houses/houses of mirrors are usually recreated on a sound stage or other set. Fun house mirrors can be rented and placed to accommodate production equipment. On screen, you will often see fewer mirrors than what might be used in an actual house of mirrors.

For instance in this Bruce Lee sequence, except for the final shot, you only see mirrors on one side of the actors. In that final shot, the mirrors behind Lee are obscured by other set pieces. The actors probably could not see the image of their opponent that they were punching in the mirror, everything was staged specifically for the camera.

Similarly, in this Key &amp; Peele sequence, the mirrors are noticeably far apart, you generally see only one actor in a mirror at a time, and mostly only see mirrors on one side of the actors at a time.