Yes. Nice restaurants and shopping. You can also do some massage.
Not much. You could eat, shop, etc. Or if you don't mind going through security again you could take an Uber to the Air and Space Smithsonian Udvar Hazy annex. Make sure you specify that one though, and not the Air and Space Smithsonian down town, which would be a way longer trip.
I spy. More seriously there is a great aircraft museum a very short drive away which would be very inexpensive in a cab and really recommended
The Uber hazy museum is 10 min shuttle ride
Walking around. Is fun
If you have a flight in section A or B, there is a long concourse of just shops and food places that you can walk around in and kill an hour or two.
There are restaurants and some lounges available through certain airlines. Otherwise, there are things within reasonable distance of the airport to do. Most of the things I have listed though are not available 24 hours a day. That includes inside/outside the airport. All I can suggest is do some research prior to your trip.
Sadly not, best to have a good book or an external hard drive full of series to kill time watching
There's bars but that's really it
Drink
Absolutely yes very nice restaurant to eat around and watch the airplane flying around. You would definitely going to love this so go ahead and try for yourself .😀
Absolutely nothing
Shopping and food
If you have a special pass, you can chill in a club for hours. Otherwise, just chill in seats, eat in restaurants, and drink at bars.
U can do shopping and there are many restaurants where u can spend the time
Thanks! Your answer is awaiting moderation.