Dave - I assume you're at the Hilton on 6th avenue between 53rd and 54th? It's a great location and gets good word-of-mouth. I worked across the street for about 8 years but only get back to that part of Manhattan about once a month or so these days.
General guideline on after dark walking zone is Central Park South on the northern edge; Madison on the eastern edge; 42nd on the southern edge and 8th avenue (or a little way past) on the western edge. The advice to watch your surroundings and avoid alleys, deserted areas, etc. apply as they would in any large city.
There are several good restaurants in the area. The concierge could be helpful here, as I'm not as up on the new names or quality of my old favorites.
- Victor's on 52nd is great if you fancy Cuban food and is a stalwart;
- Le Bernadin is arguably among the finest restaurants in NYC and is close by on 52nd.
- China Grill is up that way off 6th avenue and well liked. Portions are big.
- Steakhouses? Mortons, Smith & Wollensky
- There's the Heartland Brewery in the Rockefeller Center area
- Sea Grill (also in the Rockefeller Center area) has fantastic seafood, especially the crab cakes.
- we went to Rene Pujol in the theater district a few weeks ago and enjoyed it
- Trattoria Del'Arte on 7th has the most amazing antipasto bar I've seen
- Marc's identified Carnegie Deli for you .. a great choice; portions are gargantuan. Bring a classmate to help split the sandwich!
- Check on Beacon. They used to have a lovely wood oven crispy thin pizza we very much enjoyed.
- Finally, the restaurant at the Museum of Modern Art (MOMA) gets good press. The bar area is preferred to the sit-down restaurant in most of the reviews. Check on hours to make sure it's available after your training sessions.
Safe travels and I hope you enjoy your visit.
Cheers, Anne