Though the card was never used (purchased as a souvenir, maybe?), I was delighted to find out more about the tea room on the Streets of Washington website. If you visit the link here, which I highly recommend, you'll also see a photo of the Girl Scout teahouse erected in Potomac Park around 1920, as well as a 1924 photo of President and Mrs. Coolidge standing in front of the Hains Point Tea House. There's also a remarkable photo of the tea house when it was flooded in 1985. We're not always able to learn so much about a tea house of yesteryear, but thanks to this website a wonderful bit of tea room history has been preserved!