I've found myself in situations like potlucks where there are chips and salsa available with several salsas to choose from. I don't mind trying each one, but it's often the case that there are people in line behind me trying to get food too and I need to quickly decide which salsa to take.
Are there visual indicators that tell how spicy the salsa is? I'm guessing there aren't any definitive indicators, but are there any good predictors?