Two women, one young, one older. Both are enjoying the music and the salsa rhythm. Hands together and smoothly glide graciously, dancing at Plaza de La Princesa, at Old San Juan. Every Sunday, elders gather at this plaza and dance to latin music - salsa, merengue, bachata and anything that the DJ plays. It is rare to see younsters dancing at this venue - that makes this moment unique - both generations together, at a dance.