When will the box office be open to purchase ticket at the theatre? Right now you can only do it online and I'd rather not pay the almost $50 in service and processing fees. Thanks.

Call the theater and ask those questions yourself

Important to do... Call box office and ask if they charge fee in addition to ticket cost. Some do! And almost as much as online service. Thus you do not waste your time going there if savings are small.

Yes

At every theater I know of in NY, they're open 10am to showtime (or 6pm) Mon-Sat, and Noon-showtime on Sundays. The webpage for the specific show should have this information as well so please check there to verify. Also be aware box office transactions tend to be limited to current show only in either the hour or 1/2 hr leading to that show.