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.