what barry says is true, and on a wider basis, this is simply allowing customers to price discriminate against themselves --> just like the large cup of coffee in starbucks costing about 3p more than the small cup -- all that money is pure margin (more or less..)
Just occured to me in almost 28yrs on this planet I have never stepped foot in a Starbucks. Don't think I ever will either. I have also never been in a Natwest bank.
If i was a Hotelier I would 100% charge for wifi. it's a no brainer. I usually end up paying for it, doesn't mean I am happy about it but I accept it.