Salsa as a dance can be seen in all the places mentioned. Unlike standard ballroom dancing, there is no clear agreement on how it should be danced, and the methods differ widely in detail. The teaching of salsa is also rather undeveloped. But, as a general guide, salsa dancing is rather like other dances from Cuba, such as the cha-cha-cha.[1]
References
Wikimedia Commons has media related to Salsa (dance).
↑An extensive, though rather over-stated, discussion about salsa dancing contrasted with international-style Latin dance may be found in McMains, Julie 2006. Glamour addiction: inside the American ballroom dance industry. Weslyan, Middletown CT.