This was made one year before the Academy Awards created the Best Supporting Actress category, so Alice Brady's performance as a dithery rich matron did not earn her an Oscar nomination. The following year, Brady portrayed an essentially similar character in My Man Godfrey, and became one of the first five women ever to be nominated in the new category.
Leading lady Gloria Stuart would have many successes in the 1930s, then all but disappear from movie screens until her triumphant return in 1997, playing "Old Rose" in the mega-hit Titanic. That film reigned for several years as the biggest grossing movie of all time, won eleven Oscars (including Best Picture) and Stuart herself was nominated as Best Supporting Actress.
The "Milk Fund" was likely the Free Milk Fund for Babies of New York City, founded in 1921 by Millicent Hearst, wife of William Randolph Hearst.
About half way through the production piece "The Words Are in My Heart," one can see men's legs underneath the pianos, explaining how the pianos are moving.