This should be moved to the Restaurants board... All restaurants charge the no-show and cancellation fee, so this one does also. I honestly think you could get a walk up there with no problem, especially in Sept! We went in Nov last year, had an adr and were seated right away and the place was almost empty.. Lots of people were walking up and got seated. This is one of our favorite restaurants. I always say it is better to have an adr, just in case it is an unusual busy day/night and you'll at least be guaranteed a table- we have never had problems getting adrs there well after the 180 day mark.