Azúcar Salsa Disco runs three weekly social nights — Thursday, Friday and Saturday — with Friday the busiest. The music programme mixes salsa and bachata across the night and the venue lists free entry; it's on Calle de Atocha in Centro, a short hop from Atocha station.
Publicly available event data is limited, so expect a club-style evening rather than a scheduled programme of classes or live bands. The floor typically fills as the night progresses, especially on Friday; exact start times and guest DJs change week to week. If you want a lesson before the social, check the venue's website or Instagram the same evening — cover/door policies and opening times are not listed in the sources.
Price: 0 EUR
Event found via web search, treat this information with caution.