No. But it's a good idea if you have a large party to call ahead.
I don't believe it's required but probably a good idea to call ahead especially if it's a large group
No I don't believe so.
Not required, but you have a better chance of getting seated sooner if you let them know in advance about your party size and what time you plan to arrive.
I don't think they require it, but if you more than 5 in your party, you may want to call. Especially if you are looking to come on a Sunday morning/early afternoon. They are busy and there could be a wait.
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