Hi guys! Sorry if this has already been asked and answered in other threads. I have bought a couple of vouchers from Travelzoo for my vegas experience such as "$29 & up -- Planet Hollywood: Unlimited Buffet for 4" for a dinner with friends one night and a couple of other things. I have the app on my phone and I have printed out the coupons as well just incase. Is it pretty straight forward to use these? Do I just hand it to the server? Or is there more involved? Thanks you fantastic informative people you!