Workers have started reducing a President Street warehouse to rubble, clearing the way for another entry in Gowanus’ burgeoning hot-sheet scene hotel boom. A developer named SAI Hospitality plans to build a 100-plus-room hotel in place of the warehouse ; SAI also has designs on another vacant warehouse on the street, between 3rd and 4th avenues, where it says it’s going to put up a second hotel. A few weeks ago, the DOB rejected SAI’s initial application for a new building permit in the spot where demo’s under way, but the application shows a five-story, 117-room property is on the drawing board. We call this stretch of President the Gowanus Hotel Row –not to be confused with the larger Gowanus Hotel District –because, all told, there are three hotels planned for it. In the background is the third hotel on the street, which is now almost complete. We can almost envision a time when tourists unfamiliar with Gowanus will not burst into tears upon alighting from a cab and taking in their surroundings.