About 1770 Keyse opened a tea-garden in Bermondsey, then a suburb of London, where a chalybeate spring had been found, and which became known as the Bermondsey Spa. Here, with other attractions, Keyse kept a permanent exhibition of his own drawings. Obtaining a music license, he made the gardens an imitation of the Vauxhall Pleasure Gardens, open in the evening during the summer months, and provided fireworks, including a set-piece of the siege of Gibraltar, constructed and designed by Keyse himself.