By 1931, convention demand had outpaced the ballroom’s size, and The Del began “extensive alterations … which will give the famous hostelry the largest convention auditorium of any resort hotel west of Chicago.” Plans included an extension of 15′ on three sides “elevated above the dance floor, permitting an unobstructed view of the stage.” The extension offered the famous hotel the capacity to accommodate general sessions of large state, Pacific coast, western and national organizations. By the mid-20th century, fashion and technology dictated a less cavernous interior space (among other things, acoustics was a problem), and the ceiling was lowered.