Watch the deli meats - a lot of them have sugar. Do you have access to Boar's Head brand? They have roast beef, chicken and turkey options w/o sugar and w/o preservatives.
If you find deli meat that is ok, try making a "sandwich" from romaine lettuce leaves, meat, mustard and sprouts. Nice dinner and add your veggies = done!
You can also use those lettuce leaves as taco shells for your own prepared meat.
A small foreman grill as mentioned may be just the ticket ... if you have a fridge, you could make up some foil "packets" for your hotel week and keep them in the freezer part. Take 1 out in the morning, when you return from work, pop it on the foreman grill and dinner is done.
Suggestions: 1. fajita seasoned chix or beef w/ bell peppers (no cooked onion) in your "packet", then reheat on the grill and wrap in romaine leaves.
2. Roast beef slices w/ mushrooms and bell pepper, reheat, wrap in leaves.
3. Italian seasoned chicken.
4. Beef and broccoli w/ WF asian sauce.
You get the idea!
**I forgot to mention: Heating items on the grill in a foil packet makes cleaning the grill unnecessary.