Discoteca La 57 is a small Valencia nightclub that bills itself as a Latin "música crossover" spot open Fridays and Saturdays. The website advertises "música en vivo" and a gallery of photos; the programme and event listing point to salsa and bachata nights, with Friday the main listed dance night. The site also shows a phone number and email for reservations and a cover charge listed in local listings (EUR 10).
Expect a club-style late-night set-up rather than a formal dance school: darker room, DJ/live mix, and nightclub timings. If you want to check the crowd and floor before you go, use the online gallery or call the contact number; the homepage displays "150+" (unspecified). Practical: the venue address is Carrer de Campos Crespo 57 in Valencia; they advertise Friday and Saturday opening, but most dance listings point to Friday as the salsa/bachata evening.
Price: 0 EUR
Event found via web search, treat this information with caution.