There really is such a things as "the norm", and these days mobile phones and mobile wifi really do qualify.
Not really. In all these things there is the principle of caveat emptor. You should always find out how much things will cost before you use them. That said, if that information isn't available, then you should hound the shit out of them.
I remember my first business trip to the US in 2001 where the staff of the Marriott Courtyard in Redbank couldn't tell me how to get an internet connection (dial-in was all that was available back then), nor how much an international call would cost. So, I ended up using a null-modem cable with my mobile phone and dialling in via Germany (worked surprisingly well). Needless to say I complained strongly to Marriott and, to their credit, they refunded the charges incurred.