Yes, most of them know at this point I'm a woman. Before I didn't tell people either way, but now I make it a point to say "Hey, when you call me dude, I'm not really a dude, dude."
They still don't laugh at jokes. They don't know how to act around women, what are you talking about? They usually just try to tell me how wrong I am. If I make a joke, they get all technical and try to say, "Yea, but blah blah blah" and I'm like, "Yea, that's the fucking joke, bro." It's kinda cute. Like if I was in their general vicinity, they'd try to pump my gas too or something.