I'm a huge HotelTonight fan. My wife and I have used the app to hotel hop on some recent trips...including an amazing two nights in Las Vegas at the Cosmopolitan then the Venetian where we saved hundreds. I scour the internet to pick up codes when they become available for general use. There hasn't been any for a long time (everyone just spews their referral codes, but they all do the same thing). I just found a new code today! Existing customers can use code BOOKEUROPE to add $25 to their account! This is NOT a referral code, it can be added to existing accounts! If you've never used the app, you can download it and sign up using a referral code AND the bonus code to get a $50 credit for your first use! Those codes would be JKING295 then BOOKEUROPE That's enough to cover many of the hotels that they offer in smaller cities, so you could get a free night!