Depending on where your dancing and the dress code, are you tucking in your shirt? Some gentlemen, again depending on venue and dress code, wear Hawaiian, Cuban, Tommy Bahamas shirts that can be worn loose as it's coming into summer. Wearing clothing that "breathes" and does not hold in heat, per se, is not only a good suggestion - it will keep you cooler overall. Much like recreational sports you could look for clothing and such that "wicks" away moisture. Take a second shirt with you, 100% cotton breaths really well,no one will think your weird. Some partners I dance with actually received permission and have hung their second shirt in the venue freezer to help cool them off when they get hot and sweaty and need to change, they also keep a shirt in their car. Not a big deal. Also, some of the gentlemen who tend to have sweaty hands have some sort of talc powder and/or small handtowel with them so as to absorb the moisture. Hope this helps.