So, I own a 3 piece suit and I was wondering if I'd 'be able' to wear the waistcoat casually? I've never seen anyone where I live doing it, because the majority of men here aren't really into fashion. I tried it on with a t-shirt and thought it looked good, but I got thinking that maybe there a different type of of waistcoat that's made specifically for casual wear? Anyway, since I've never dipped my toes in this, I was wondering what the basic do's and don'ts are for this. Thanks.