Is there anywhere left that you can’t wear a pair of sneakers? Well, yes. Weddings, funerals, and your grandma’s birthday, for starters (she’s 90 years old, for crying out loud. Put on a tie). Beyond that, the rules can get a little hazier – especially when it comes to the workplace. These days, all but the most formal of offices have embraced a business-casual approach to dressing (if you’re not sure what that looks like, do take a look at our guide to the subject).