From the Wikipedia page 
Cuper's Gardens were an 18th century tea garden (a smaller version of pleasure gardens) on the south side of the River Thames in Lambeth, London, looking over to Somerset House near where Waterloo Bridge is located (centered around what is now the north end of Waterloo Road).
The gardens opened in the 1680s and were named after the original proprietor, Abraham Boydell Cuper, the gardener of the Earl of Arundel. They were also known as Cupid's Gardens. A long landing stage in the river known as Cuper's Bridge acted as a popular entrance for the gardens.
In 1736, an orchestra was included among the attractions. It also became known for its firework displays. However, it lost its license in 1753 due to the loose morals of its visitors.