La Casa Tropicana is a seaside restaurant-bar on Ban Tai that runs an informal Latin social night on Saturdays. Expect the dining area and sea-view terrace to be rearranged for dancing rather than a purpose-built floor: a bar along one side, outdoor seating catching the sea breeze and tables pushed back to make room.
Music on Saturday evenings mixes salsa, bachata and kizomba; guest reviews also mention occasional classes. The venue operates early evenings (Google lists Saturday hours around 17:00–22:00), so the social tends to heat up after sunset and wind down by closing, it is not a late-night party. Service reviews are mixed, so plan to eat earlier if you want dinner before the dancing.
Check La Casa's Instagram or Facebook before you go, Saturday events and class notes appear in reviews but there's no clear dedicated events page. Arrive early if you want a table or to secure space on the floor.
Price: 0 THB
Event found via web search, treat this information with caution.