While waiting for the bus at Mass Ave and Washington Street in the South End, we used to always wonder why an entrepreneur never converted the former Alexandra Hotel into high-end condos. It wasn't for the lack of effort. A 2006 Globe piece documents the building's long, troubled history, describing an "old Gothic goddess [that] now stands out on the corner as an over-the-hill vamp, wearing graffiti like smeared lipstick. Redevelopment is passing it by."......