Salsa clubs vary in how loud the music is, so some people may be more at risk than others. The more frequently you go out, the more damage you are potentially causing. If you think this is a problem for you, you may want to try using earplugs. I made a recent earplug discovery when I noticed a salsero friend wearing these- musician's earplugs: they soften the loudness without muffling the sound.
Excessive noise exposure is the most common cause of hearing loss (source: American Hearing Research Foudation). For this reason, we salseros who are risking our hearing should take the proper precautions so that we can coninue to enjoy our passion. The earplugs were originally invented for musicians who are constantly exposed to noise, but need to hear the sound quality, as this video explains:
This is a great advantage compared to regular earplugs. Plus, regular ones can be less than aesthetically pleasing (hot pink anyone??), and these earplugs come in clear. There is a range of styles and prices, from $12 one size fits all to the more costly $150 custom fit earplugs. I hope this information is helpful and allows more people to enjoy our hobby and passion without risking our hearing! Here are a couple of sites that may be useful: