Not busy
It's rarely that crowded. Every time I've ever gone there's been maximum 30 people. I'm assuming you're asking about Endgame thought, so it might be way more crowded considering the hype for the movie.
Not busy at all in the week
It's a pricier and fancier theater so it's less crowded. They do hold screenings and such here, so that could be a crowd but they are usually private and pre-planned so all good.
Going any day other than the weekend as long as it's not the week after a movie is first released, you can pretty much guarantee only 2 dozen others at most
Quiet
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