I used to travel alot and always stayed at different hotels, cheaper ones like, Hampton Inn, Holiday Inn.... They are alwasy competing for your business so most of them used to have the best breakfast. Some of it would be sugary foods, but many had small kitchens and they would make tons of eggs and good stuff.
I dont travel anymore, but if Im out and its early, I will stroll right into a Hampton Inn about 10am and have myself a little meal!!
They dont ask you for your room key...They wouldnt even consider someone doing it. But if you do it and dont want to feel paranoid then walk up to the front desk when you come in and ask them for directions from the HOtel to wherever. They are always glad to help a Guest!!!
*side note* if you are ever on a road trip far from your home and need to take a dump. The lobbies of those nicer Hotels like Hampton Inn have very nice and clean bathrooms.
Perfect for us Picky people who have a hard time taking a dump in a public place!!