I never flew on Concorde, but I was treated to a grand tour of the one in Everett, WA several years ago. (Normally glass partitions keep people out of the cockpit and cabin, but our tour group was allowed in)
NOPE.
It's a good thing that flight is so short. I'm 6'5" and at that point about 240 lbs., and I found it was not a fun experience. Leg room wasn't much different than a standard airliner (so, awful), but the seat was very narrow, the cabin height forced me into a pose more suited to ringing bells at Notre Dame... and look, my major is aviation, I get it- smaller cabin means smaller fuselage, means less drag, means less power needed to get up to speed. Simple. But very uncomfortable for a man of my size.
For comparison's sake, next to that aircraft is the 747 prototype, City of Everett. After cramming myself in Concorde for the past 30 minutes, I could have stretched out and dozed on that birds' seats. Every time I get on an airliner, I think of City of Everett... I'm slimmer now than I used to be, but no shorter, and I dream of the days that a plane like that was the way to travel. She looks pretty awful these days, from what I hear, but only a little worn back when I toured her.