At Senor Frogs at Treasure Island, Las Vegas, NV, but one entree and get a second entree free via this printable coupon, as provided by DestinationCoupons. (Select "Click here for your Coupon" to see the coupon.) Reservations are not required; the coupon must be presented to your server. (It can be printed or presented on your smartphone.) Book this travel deal by December 31.