I attend two or three conferences a year as part of my job, and I've always been annoyed at the "business center" in most hotels, which is typically a collection of outdated Windows machines and a laser printer or two. The real annoyance, though, is the cost of the centers. It's usually $1 per page or more for printouts, which is entirely outrageous. I'm not a cheap person, but the practice of gouging people to such a degree is really irksome to me.
What I've discovered, though, is that while most hotels charge outrageous fees to print documents, they allow their guests to receive faxes for free. All one needs to do, therefore, is connect one's Mac to the telephone line, print the document, and select PDF -> Fax PDF... from the print dialog's pop-up menu. As an alternative, one could obtain an account with send2fax, and send the document as an attachment to, for example, 1234567890@fax.send2fax.com (this would be to fax it to (123)456-7890). Send2fax also has a nice web interface, and as a bonus, it gives you your own personal fax number to which faxes can be sent; once received, they are converted to e-mail attachments and sent to your inbox.
There are, of course, costs either way -- the cost of an "outside" call in the first case, and $0.15 per page for send2fax sending. But given that many hotels have free wireless access, the latter option should in the worst case cost a small fraction of what the business center would charge.
Finally, an advantage for night-owls like me: printing via fax can be done 24/7, whereas the business center is often open only during normal business hours.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20050906171138592