They have both, although the single day rental usually is restricted to the open areas and conference rooms. I used it for a few days a couple months ago in DC,

They have both, although the single day rental usually is restricted to the open areas and conference rooms. I used it for a few days a couple months ago in DC, it was nice to get out of the Airbnb I was in. But also relatively cheap ($19 a day with no commitment), and it looks like that location has closed since :(