The other day, I was on OpenTable to book a reservation at Range, a popular restaurant in San Francisco, and the online service prompted me to enter in my credit card number. It may not be the norm, but some restaurants — like Agave and Momofuku Ko — stand by this policy. Although it could seem risky to reveal a credit card number before any sort of purchase has been made, the practice seems to make sense for those restaurants who would have lost significant business due to no-shows.

What is your opinion on this issue? Are you willing to, or have you, plunked down your credit card number to secure a reservation?