What restaurants do you recommend that are very close to the Ambassador Theater? Seeing Chicago at 8:00 and would like less than a 10 min. walk from a restaurant. Any price/cuisine is fine.

There are roughly 200 choices. Any "theatre district" restaurant is about that distance.

But I'll jump in and suggest Roberto Passon -- wonderful Tuscan food in a nice little restaurant where you aren't jammed in, and delightful service at reasonable prices. It is at 50th and 9th, close to the Ambassador on 49th near 8th.

http://www.robertopasson.com/

Baldoria is on the same block as the theater (Italian) and has a prix fixe dinner for $35/person. Check reviews and menu here http://menupages.com/restaurantdetai...=0&cuisineid=0

The other day Doug Stallings (editor here) mentioned a restaurant I haven't tried called Tintol that sounds great. Spanish/tapas and only a few blocks away. http://menupages.com/restaurantdetai...d=0&cuisineid=

If you're looking for ethnic food, Pongsri Thai is a block away.
http://menupages.com/restaurantdetai...=0&cuisineid=0

The Ambassador is near 8th Avenue & 49th Street, so Tintol might be a bit far (still probably within the 10-minute commuting distance). I'd suggest looking at the places on the so-called "Restaurant Row" on West 46th. Becco is excellent but incredibly busy. I sometimes eat at Le Rivage, which is a very old-fashioned French restaurant. And, of course, my favorite is Vice Versa, which is on 51st Street. Marseille is also close by. Just make reservations.

Since the OP says, "...Any price/cuisine is fine," I would certainly go for a higher-rated place than some of the suggestions.
For starters: Orso or Lattanzi on West 46th, Redeye Grill at 56th & 7th or Remi on 53rd between 6th and 7th.

Perfect place -- Sosa Borella on NE corner of 50th and 8th -- practically around the corner from the theater. It's Italian with a slight Argentinian twist. It's my favorite pre-theater spot that doesn't attract pre-theater crowds. The downtown location is more well known, but this one is equally as good.