Regarding yesterday's discussion of dressing up...part of my outlook probably has to do with Oregon, particularly Portland, and the way people here "dress-up"...for men, anyhow, it tends to be dressy-casual. Meaning, khakis can substitute for slacks, and polo shirts can substitute for dress/sport shirts. And jackets go with anything. Nice khaki shorts with sandals are common men's wear at matinees during the summer, though maybe not so much for an evening performance.
These are just my observations, mind you, of what I see when attending the few ballets, Broadway shows, and other theatrical events in Salem/Portland. I imagine Ashland is much the same.
The rest of the state's populous, however, only attend rodeos and tractor pulls, so their way of dressing may vary.