My partner and I never dress up. We don't even own fashionable clothing, as our lifestyle is not conducive. We both chose career paths which don't require it.
When we wish to eat at finer and more exclusive establishments, we either go during off hours, or wear all black and a jacket or sweater of some form, and our best shoes.
Once, he and I were in a "casual family" place, and the people being shown their seats near us asked not to sit near "the lumberjacks" ( we were in laborer-wear and he has a full beard. ) It was very cute.

