You can use the filters to see them in a new page.
But if you want to obtain a single page with your main item (location), and your related items below (rooms), the best is to merge the two views in the same.
A little bit of code is required both in you VIEW file and TMPL files
TODO :
Create a layout displaying filtered rooms (by location)
TO CODE :
Extract from this layout all the code and merge it properly (copy & paste don't work) in your main layout (location)
Then, instead of using a filters, connect the value of the main item, to filter the model of your rooms
(model->addWhere(.....))
I explained this many times in the forum and it is a very nice exercice to understand your component.
(It is the very first step)
Try even to do it by yourself, following this map. Read the files and try to understand, it will save you a lot of time once you've got the concept. (VIEW and TMPL is the most easy part)
I hope it helps.
A documentation of Cook (and coding components) will start to be written after the V2.0.
For the moment, V1.x is a draft, so there is no-sense to write an obsolete documentation.