Salsa gets hot in Houston. Almost every club in town these days features "Salsa Night," where the scene is set and the floor is full. Some are new; others have a past. Downtown has entered the fray, with Prague on Tuesdays and Sambuca on Thursdays. The draw is big, but is it just the latest promotion to keep the drinks flowing? Saturday night on the Richmond Strip, up-and-comer Metropolis sports a long line at the door and a longer parade of rims and music awaiting the valet. Some "disco" in the mix, the dance floor is more rush-hour subway. But how do you want your salsa? For the traditional experience, Club Salsero plays the standards and doesn't encourage pretension; do your thing, and don't make a scene. Salsa deserves some show and good music with the energy of live entertainment on occasion. An escape from the dance floor either to romance or to observe is a necessity. Tropicana Nite Club offers an intimate old-world ambience, with energy both on and off the floor. Some dancers have flare, but most of all, the music is right on. That's how we like our salsa.