Public ranges are very similar to most gun shops... They are best visited when the least number of people are around. It's also a very good bet that in-depth conversation should be avoided, even with the owners, unless someone ASKS YOU for help... Even then, the odds of encountering baffling BS is very high.
Luckily, I normally have a private range available. It's easier to convince, or convert, those well-intentioned dummies with a few range sessions...polite conversation almost never works.