Want to know which hotels offer the best and worst Wi-Fi? Check out Hotel Chatter's 2012 hotel Wi-Fi report, which includes a great flowchart on this infographic about whether or not you can expect to get free Wi-Fi.
And in case you were wondering just how much of a cash cow Wi-Fi can be, they estimated the numbers for a typical 250-room New York hotel thusly:
Average total Wi-Fi installation cost: $125,000
Average yearly Wi-Fi maintenance cost: $7,500
Average yearly profit from Wi-Fi: $200,000