Can you purchase tickets at the door?

Yes, if the show us not sold out. Also, some the tickets are cheaper. Not the show price, but the online "convienence fees" are not usually charged when you get the ticket at the door.

Yup

Yes if its not sold out.

Depending on the show

If available, yes(:

Yes, but only if the show's not sold out.

I recommend you buy your tickets at seatgeek it's an app but yes you can buy tickets at the door

Yes

Indeed

If the show isn't sold out, I believe you can

Yes. Door prices are listed on the website too