My recommendation is Gentleman's Guide. Not sure why posters on this thread thought is was boring. I thought is was anything but. And, I like supporting NEW and original broadway shows. Just my two cents.
If you have cocktails or dinner at the Bar Adagio (inside the Hotel Adagio), which is a half block from the theater and show your ticket, you get 25% off all food and beverage. They have a killer gourmet burger for $11.00