Havana Bar Kitchen and Wood Fired Pizza in Waltham Forest

Myself and my wife were going for a meal on Saturday 26th in Hoxton when we noticed the sign for happy hour outside the Havanna Bar so we decided to pop in before our restaurant reservation. We sat down and waiter came over and we checked happy hour was in place and was told yes as long as we had one of selected cocktails. We ordered two cocktails and when they came we was told they were full price. We did pay but on reflection later we were very angry. Nowhere does it say on sign or menu that happy hour was only Monday till Friday. This is false advertising and we will be reporting this.