Looks like a floating condo - probably not sea worthy. I have a buddy that has lived for years on a boat just a couple blocks off the Mall in DC. Cool setup. Looks like Capital Yacht Club. Here is the view from across the street.
https://www.google.com/maps/@38.877156,-77.027385,3a,30y,42.9h,91.33t/data=!3m6!1e1!3m4!1scbX4S3-CsO9pU9rF2vIC3w!2e0!7i13312!8i6656