The Valley Forge Music Fair was an entertainment venue located in Devon, Pennsylvania, outside of Philadelphia, constructed in theater in the round style with seating for 2,932.

Radio broadcaster Frank Ford and nightclub owner Lee Guber were returning home with their wives after attending a 1954 musical performance presented in a tent.

Together with Shelly Gross, a television news anchor who had become disenchanted with his profession, the three raised $100,000 to lease the Devon, Pennsylvania site of what they named the Valley Forge Music Fair, which brought in profits exceeding $50,000 in its inaugural season in 1955.

[5] After the closing was announced, with site to be replaced by a Giant supermarket, Gross recalled being conflicted, feeling that it was "like watching your mother-in-law drive off a cliff in your brand-new Mercedes – mixed emotions.

[7] The success of their facility in Devon led to efforts to replicate the model, and the creation of other music fairs in suburban locations on the East Coast.