I've slept under my desk because the couch was already occupied. I think a certain amount of pain in a startup focuses people and I'm very good with that.

As for sedentary, it doesn't have to be. I worked at 100 Hamilton Ave once before it was Palantir. Boring work but there was a gym in the basement. I got my bench 1RM up to 270.

And I've worked at a certain company where the VP of Resources personally adjusted the Aeron to my 6'4" as part of my onboarding. This did not impress me.

It ain't the chair.

it ain't the chair, but it's a nice perk to have as far as perks go. I'd probably pick a nice chair over almost any other office amenity.