I always wear nice clothes on the plane (comfortable khaki's, dress shirt, golf shirt, etc). It's just me; maybe I'm old fashioned. But I try to be presentable. When I'm at the RCC, I usually look okay because I look okay on the plane.

Many times, I see people wear jeans & T-shirts to top-end restaurants (not the RCC) here in San Francisco. These places will be $100/person, people are there for their anniversary, and the dude next to you comes in with jeans and a metallica t-shirt (Yes, personally witnessed at Gary Danko!). It is just disrespectful to others when people look like they have recently emerged from the mountains without food, water, & showers for the past 3 weeks.