I always open the building and car door for my lady. Always.
I have found that when the younger generation sees it that sometimes the guys will do the same for others.
On another note, I will open a door for a lady that has her hands full with children especially strollers.
I open the doors for the elderly.
I like to open the door for a lesbian just to see the glare I get from the lesbian girlfriend afterward. Yea, as if you got the balls to do it for someone else.
I won't open the door for someone, lady or gentleman, that is flapping their gum's on the cell phone.