Might seem like an obvious or silly question to some, but I'm really not sure and I dont want to get it wrong. I only have 1 suit and it is 3 piece, I could wear without the waistcoat but its single button and goes quite low (to compliment the waistcoat). It is very dark grey I will be wearing with a white shirt and a plain black tie, but will I drawn bad attention to myself by wearing a waistcoat? I've always considered a 3 piece suit more of a business dress really.