I just made a reservation at Arpege through the phone. What surprised me was the fact that they asked me for my credit card number as their 'guarantee' in case I don't show up. Maybe it's just me, but I have never had a restaurant ask for my credit card number prior to my visit. At least they don't do that here in Tokyo, which is where I currently live. They also didn't ask for my cellphone number nor the hotel I will be staying at. The only information they have at hand is my credit card number along with my reservations dates and details.
Is this normal? Please share your thoughts, thanks!