Complete the name of the painting by French impressionist Pierre-Auguste Renoir - "Luncheon of the..."?

I love Renoir's subtle use of red in his paintings.

The book, ‘Luncheon of the Boating Party’ by Susan Vreeland tells the story of of the characters in the painting and how they are interlaced. The painting, itself, is located at the Phillip’s Collection in Washington D. C. I’s amazing to see it especially if one has read Vreeland’s book and can identify the characters in Renoir’s painting.

We have this painting. Oil on canvas’s. So lively