Heading out to Vegas again for UFC 200 weekend. We will be staying at the Cosmo for the first time. I'm forcing my girlfriend to come along, as well as a good friend. I have reservations for STK, Beauty & Essex, and Rose. Rabbit. Lie. We're very late 20's simple folk who enjoy jeans and a sweatshirt, but we know how to dress up for an occasion. Does anyone have any experience at these places on a busy weekend? Girlfriend will be raiding the dress shop there, so she's fine. As for us guys, we'd prefer not to dress to impress, only to skirt by just well enough to not be considered under-dressed. Any advice is welcome and appreciated.