vibrams are great. they are probably the closest shoe to being barefoot because they are so form fitting, have a super thin sole, no support, etc....but mostly they allow your toes to flare out better than most shoes. on top of that, they are one hell of a conversation piece, which i'm guessing is helpful in a salon. for casual work wear, go with something simple like the classics. if you want to do a little more with them, the sprints are really versatile, easy and have a simple, smoother sole not built for long runs or hiking (some are built for outside, you probably want the simpler models for work).
but, those aren't your only option. i actually wear a pair of water shoes at work. they're completely flat, no support, wide toe box, etc., and they only cost me $15. there are a lot of minimalist/barefoot options out there, but they're pricey. water shoes or ballet flats will feel about the same while costing less than $20.