It depends on how large your party is. If you have a party of 7 or more, you can call Group Sales and Reservations to reserve a time slot for you. If you are a party of 6 or less, I would recommend coming in the day before and asking if you can reserve a time slot for the next day.
Yes, it's better to have a reservation as there is a lot of rush and waiting during holidays and weekends.
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