The sign on the north west corner of the Bainbridge Tower building reads: "Register Now / Modern historic lofts / Bainbridge Tower / Starting In The Low $200,000 / Call Now For Viewing / 555 555 2793". As with several phone numbers on in-game signs, calling this number does nothing.
The building exists in Saints Row, although there is no road in front of it, and no "Bainbridge Tower" sign. The stairway is the same, but the leasing office is occupied by a candy store. The building to the south is a copy/paste of the same building, and repeats the candy store's storefront.