I wear lipstick to weddings and funerals. Even then I wear a pair of my "good" slacks. It's jeans, T shirt and slippers or old hiking socks for me. When I'm really fixed up I look for a T shirt that doesn't have a logo on it. I, too, have no dresses in my wardrobe.
Oh, and don't for get the athletic or hiking footwear. It's comfort for me in my old age.