Songbooks:
I had that happening to me to one time. People just don't think. The guy who circled a song in my songbook with a pen, then has the nerve to come up with songbook and pen in his hand and points to the circled song, tells me he wants to put this song in and then denies on top, that he didn't circle it... that guy takes the cake so far.
Kiosks:
I use one Kiosk station for over a year now. I always keep it close to where I setup and never had a problem to do that. I use a MSI All-In-One computer with touchscreen for it. Setup time is about 40 seconds, space required is about nothing and I never had a problem with people complaining about to many people at once at the Kiosk. They're regulating themselves! If they see, there is one or two people at the Kiosk they just wait and walk up to the Kiosk when the other people are done. They know it doesn't effect their place in the rotation in any way.
And those All-In-One computers are laid out in a way that when someone should spill something on that table where it stands, it would only wet the stand it rests on, but not affect the computer itself. Besides that, I usually tell them that I don't allow drinks near any of my equipment and people usually keep it that way.
having to print one page, and slip it back into that plastic protector will sure set you back a few seconds, and a couple a pennies....... 
