Pity really, I'd quite like to do some touring without having to pay!
It is not at all problematic to extract enough value from a conventional hotel visitor to pay for their room. The real puzzle is that a free room doesn't attract that kind of people. You get people who feel obligated to draw penises on the wall, shit in the sink and stab holes in your mattress. The normal audience you get, after making the reservations and/or picking up the key mostly wont be in the room because they don't need it.
Whatever plot one was to come up with to realize it it is almost guaranteed that it would work better if you charged extra for a room with such creative original features all this wonderful product information as the deeper the pockets the more valuable and less annoying the promotional circus.
Which is also why a lot of people are perfectly okay with, and use social media