A big promotion deserves a night where you don't have to look at the prices on the menu. The key to enjoying that steak without stress is setting the date far enough out that you can plan the logistics and the payment side by side.
Book your table at least a month ahead to secure a prime weekend spot. Once the reservation is set, you can treat the bill as a planned expense rather than a sudden hit to your checking account.
Remember that the 0% intro window is a deadline, not a gift. If you still have a balance on the card once that 18-month period expires, the bank will start charging interest on the remaining amount.