Urban beach
From Wikipedia

Temporary urban beaches and art installationsA well known art gallery, PS1, had an art installation in the summer of 2002, to explore issues of privacy and space, through the juxtaposition of the incongruous elements of beachlike waterplay space within the formality of a museum/gallery:

...Urban Beach addresses concepts of surface and sensuality, redefining shade, privacy, and space

One of the busiest streets in downtown Paris was also turned into a temporary urban beach.On a busy downtown Toronto Street, a hot tub was recently setup right next to the sidewalk. Part of the fun is challenging people to overcome their fear of being seen in a bathing suit, on a busy street in the restaurant district where people are normally wearing more formal attire. To further suggest public bathing as performance art, participants (many of them passers by who could choose to join in the fun) were fitted with brainwave electrodes, which enabled their brainwaves to generate music and control the lighting.

A number of urban beach art installations were made as a form of social inquiry into the boundaries that exist between public and private space. This helped to combine fear of water, fear of electricity, fear of being seen in a bathing suit, and stage fright, into chance to dare passers by to join in a thrilling spectacle. Stage lighting, controlled by the brainwaves, adds to the notion of urban bathing as performance art.