What is the pineapple dance?

Pineapple Dance Studios is a dance studio complex based in the Covent Garden area of central London, England. It is widely recognised as being the foremost dance centre in the United Kingdom and one of the most famous in the world, being used for castings and rehearsals by leading international dance companies, record labels, television networks, film studios, West End shows, cruise lines, talent and model agencies. The studios are primarily a venue for dance training, with a daily timetable of classes that are open to the public and which cater for all ability levels including beginners as well as professional dancers