I bought a Groupon after calling Bike and Kayak to ask if they had an opening for a Groupon deal on a particular day and time. When I attempted to redeem the offer, I got the redemption code and I was unable to use it. When I called Bike and Kayak, they said they only allow a few Groupons to be redeemed on weekends and I should try a weekday. That wouldn't work for working people. I then contacted Groupon to try to return the coupon, but since I had gotten a redemption code, they wouldn't let me return it. The entire fiasco took me hours to work on and I have been fuming about our ruined trip for days.