this has always been a big big issue for us, that we cant set if a room can take children or not, and extra adult tariff, I see now that we can set what is the max adults and children per room, and that is fantastic, but there is still more issues. I saw that we can set the extra adult tariff in the property settings but than that tariff is for all rooms and it will not work because not all rooms are the same some are 2 star or others are 3 star, some have extra features and so on, and then the tariff for extra adult is always different, it will be best to put the extra adult tariff field in the tariff plugin, and the ability to add more extra guests, I attached a screenshot of what I have found on many many sites, and it works like a charm. Please, please, consider this while you are working on it, I have worked with this type of tariff setup on a couple if the big sites and its a real pleasure, it reduced the amount of tariffs greatly, then it wont be such a long list of tariffs in the front end, and what is more, the property owners find it very easy to work with.