1929 and several other occasions
First Lady Lou Henry Hoover was hosted by the Mount Vernon Ladies' Association for tea in the Small Dining Room in 1929. She later accompanied her husband to Mount Vernon to celebrate the 198th and 200th anniversaries of George Washington's birth.
“President Herbert Hoover and Mrs. Hoover commemorated Washington’s birthday, 1930, motoring down and placing a wreath in the Tomb. Mrs. Hoover, very charming and gracious, has found occasion to bring house-guests frequently.”