How do you get in the Marquis Theatre?

Hi everyone. Sorry if this has been posted or answered before, I searched and couldn't find anything. I have tickets for tonights performance of 9TO5, and I was wondering, since the Marquis doesn't have a traditional entrance like other theatres (I think), how do you get inside the theatre. The entrance on Broadway, right under the marquee says Box Office Only, but can you still get inside from there. I know other people have said you actually have to go inside the hotel or something, I'm not sure. Any and all help is great. Thanks!

Walk in the hotel and go up the escalator to the 2nd floor. The theatre will be in front of you.

Bobby beat me by seconds!

But if you're with Jen Cody or Mary Faber take the elevators!