You can easily add hotel registration link from menu item. All you just need to do following:

> Login site administrator area and click your desire menu from Menus  
> Click new from top right side
> Select External link
> Type Title and Alias based on your needs and add following url "index.php?option=com_hbsuserregistration" into your link fields.
> Configure all other feature based on your needs
> Click save

If you still have any question please ask in forum.