Edit: confirmed that this isn't the place I have issue with. The one that did the Groupon trick doesn't seem to have a yelp page. I've changed my rating to four stars as to minimize the effect my review has as I've never done business with this salon.
If I could give a zero I would. I received a pair of groupons to this place for my birthday for me and my SO and when I tried to redeem them they refused and said they are not accepting them anymore even though they were nowhere near expired and that I have to speak with Groupon about a refund. They sold these things to promote themselves and make a quick buck and then got greedy and refused to honor them. Companies like this do not deserve to remain in business.