Originally Posted by
offerendum
In the end, they were still fired up for us to sign the check. They even ran after you for it. Since the check always looked like this, you can hardly explain it with interests of the hotels.
I have a afeeling it's about that additional tip line. As far as I remember, it's customary to tip staff in the US even for stuff that's "free" i.e. a dollar or two per drink in a staffed airport lounge.