Yes. Especially if you have a specific or special occasion. You do not want to wait 40 or 60 minutes to get to sit all together in one table.
On the weekends DEFINITELY, maybe not so crowded during a weekday evening but you're still taking your chances if you don't call to make reservations!
You should or you might have to wait a long time and even possibly have to split up.
Yes, you should but you dont have to. It will take longer of you dont.
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