While the hotel concierge can certainly help, we have had difficulties in the past getting same day PS's (even using the concierge) for the more popular restaurants. Of the ones listed, I would put Cal Grill, Le Cellier and Wolfgang Puck's in that category. The hotel concierge can certainly help with this, but if you are waiting to the last minute, I would be flexible in choices and not get my heart too set on any one place.