Our jukebox is used in two rooms and each room has its own remote control. Having two remote controls is something of a luxury because the jukebox could work just as well with only one. The same music is plays in each room, so it would be perfectly feasible, though less convenient, to carry the remote control from room to room as required.

Having two remote controls has additional benefits:

1. When designing and writing the software it's possible to set the two remote controls up differently and do side-by-side comparisons.
2. If one remote control were to break or have its batteries totally discharged, we wouldn't be without music.

The two remote controls can browse the music database simultaneously and independently. The "Player" and "Queue" parts of the display are different, being updated automatically by the server, so any changes made on one remote control are immediately shown on the other.

The CGI programs are written in such a way that simultaneous commands from both remote controls are acted on in an orderly way. So if, for instance, two users click on "Play Now" at exactly the same time, the jukebox will play one user's choice of album, not the two albums interleaved.

The browser on my main PC is effectively a third remote control, and all that I've written on this page about a second remote control applies to that as well. There's no reason not to have four remote controls, or in fact any reasonable number of remote controls.