Unless you have pain in your foot or have hurt yourself accidentally against something do not think of wearing a flip flop to an office this is a definitely no, no so wear leather shoes instead to the office.
Unless you get a pedicure regularly, your feet probably look much better clad in leather shoes than exposed for all the world to see. Why then must we address flip-flops as an office wear no-no? Because casual Friday became casual Monday-through-Friday, some think they're living in a Corona commercial and keep showing up for work with bacteria factories strapped to their feet. Spring break may be a state of mind for you after your school days have ended, but we’ll leave that for your therapist to resolve. What you need to understand first is that men wear socks and leather shoes to work. For ultimate comfort and versatility find a pair of leather loafers in a British tan -- they're just as comfortable as flip-flops and a lot less childish and underdressed.