Joomla - sub-joomla sites

create sub content on a joomla site a 'mini site' contained in the main joomla site ## Deliverables i currently have an operational joomla 1.0 site. i would like to allow certain users (who will be assigned by me) to run their own 'websites' through my overall joomla site. these people? are the organizers of clubs, one club per city.? this project is to allow the club organizers to use the functionality/community of my existing website. i would like them to be able to have a url called www[mainJoomlaSite].com/[CITYNAME] i wish to give admin control to these users to modify their own page's menu buttons, layout(within the layout of the main site), and to send out newsletters to their users (I already have a functional newsletter component working) their club page should have public information, and club only information their club members would be users of my overall webpage, but would have the ability to see links in their own club's page, and also have access to a fireboard forum designed for their own club (as well as being able to use the main overall forums) i would like this process to be as 'automated' as possible...so when a new user comes to me saying 'i want to start a club in this city' i can create his new club's page/functionality very easily? (this could even be accomplished in a step by step instruction for me to follow when setting up new users) i foresee something like 20-50 of these groups eventually being added, iwth only about 5-10 to start off with