If you go early you might avoid a wait. If it’s full you give them your cell number and they put you on a list and text you when you can come in. No reservations.
And the menu is the same, same drinks, small plates, etc. Just drinks come in plastic cups as opposed to glass (except I suppose for souvenir cups - never purchased one)
The Ukulele player is great.
Thought inside does have a cool atmosphere. If you have the time, I'd put your name in then sit outside. But expect a wait.