if you work at a bank... dress like this (shirt, no tie, flat front dressier pants (but not suit bottoms)).
http://www.job-interview-site.com/images/dress/business-casual-man1.jpg
http://resources.shopstyle.com/sim/03/ff/03ffbc1b343e28b4c4418d842497bf64/lacoste-macys-tall-shirts-big-and-tall-shirt-long-sleeve-regular-fit-oxford-woven-shirt.jpg
polo shirts make you look like and uncool dad.