Hotel's official name: Washington Hilton Dupont Circle
State/province/country: Wahington, DC
Your status (Gold/Diamond) at time of stay: Diamond
Type of breakfast offered (full/intermediate/continental; see wiki): There was still no "official" breakfast offered of any type. You had to go to to only open store in the hotel lobby (Green Leaf Tea and Coffee) where you could choose dried cereals (cold or reconstituted hot), bottled beverages, pastries, cut fruit in a box, and two hot options; a breakfast sandwich (think Micky D's) and a breakfast bowl where the scrambled eggs, bacon and potato's were all together in a bowl. Each item was individually priced so fully a la carte.
Taken in restaurant or lounge?: There was no seating in the store. You brought your food into the lobby. Seating options included using the bar area that was open for cocktails in the evening (some food served there as well at that time) or in the lobby itself.
Extra options (e.g., upcharge for full breakfast): There were no other options. As far as what a diamond received, the message was very mixed. I was told on check in (2 people) that each room got $10/day for their "spend any way you wished" which meant you could eat breakfast or if you wanted have a drink instead. The problem was that my breakfast of 2 dry cereals, one banana and one OJ came out to $25 and my wife's breakfast bowl, cut fruit and coffee came to almost $37. I used the word "confusion" because it became obvious to the powers that be that what they allotted for a person would pay for a cup of coffee ($5) and danish ($4.95).
In the end, they just deducted the meals from the portfolio at checkout.
Added your report to wiki?: Why bother. I have been coming to this hotel a number of times per year for at least 20 years and the lobby would be packed with people. This time, I was the only person checking in and no one was checking out. It was very quiet. Hopefully, as the pandemic ebbs, things will return to normal but for now, if you are going, and have status, you will need to point that out to the desk to get a minimal breakfast.
Date: May 28-30