Clothing can sometimes be categorized into "genres" and sometimes it's fun to mix those genres. Business pants, combat boots, with a bright tucked in t-shirt? Sure! Why not?! Don't feel like you're investing all you $$ into your workwear only to use inside an office. Mix simpler pieces with business pants or skirts. Try a band graphic tee and sneakers with your black office slacks... do you get what I mean? P.s. this doesn't require a lot of work.