Our road crews and construction workers that work eight hour shifts at those temperatures laugh at this weakling of an article author.

Yeah, but your construction workers probably aren't wearing short skirts like several of the other patrons were ;-)

Honestly, though, I think the 30-minute limit is less to do with health reasons than financial concerns. It's not a large bar, and most of their income seems to come from the cover charge, so it's presumably in their interests to make sure people don't stay too long.