How about offering free WiFi near the reception and letting people pay as they arrive?
Not for now.
All he is looking for is a way to stop asking for people for their credit card numbers in emails when they want to make a reservation.
The desk mostly runs on cash - I think credit card transactions incur a 1 or 2% fee - will have to check (and yes that's legal and increasingly common in Australia - Reserve Bank changed the law about 2 years ago - no more subsidising peoples reward schemes by those of us who pay cash)
Of course if he gets enthusiastic about the whole bitcoin project anything is possible.