Concerning the hotel rooms themselves, perhaps using the "Use" key on a TV to change the channel displayed (and with that they wouldn't change automatically).
I would love to do that. Really. The issue with that is that would eat up an unbelievable amount of scripts and tags and, while it would be cool, it would be really impractical as well.
Perhaps somewhere in the hotel there could be a master switch somewhere in the hotel that causes all the TV's in the hotel to turn on/go to the next channel/turn off?
Either way, I assembled up a mockup in-game map of what the hotel would look like in my eyes:

Changes:
*Entire 2F added, minus weapons (IMO it'd look better in purple instead of green)
*Inaccessible rooms in the hotel's front windows removed; the windows are made solid
*Restrooms added near MM3 Hall (The hallways they are locate in should be wider than shown, FYI)
*Added backway entrance to the pool
*Added a sort of courtyard similar to the original hotel's garden
*Altered the size of the changing rooms slightly
And now an atlas of the RM placement on 2F: