You can, but my concern would be the hold which other posters have mentioned. What I like to do is book on Priceline, etc. and use my debit card. Then when I get to the hotel & they ask for a credit card for incidentals, I just ask them to shut everything off instead (outgoing calls on the phone, pay-per-view movies, etc). So they don't need a card.. It's worked for us in the past multiple times.
1/7/10 at 2:07pm