Right, it's a double-edged sword. 'Premium' customers find coupons unseemly and wonder why a good business needs to offer coupons (I have this knee-jerk reaction myself, as I didn't grow up in the US perhaps). On the other hand, groupon offers a level of exposure that may be compelling. I think that the yoga studio owner has come to the right conclusion to her - grow her business organically based on quality.