So, you mean you'd like to offer different membership levels to different types of users? For example, you have four types of users: Aficionado, DJ, Band, Sponsor. Then , to each user-type, you'd offer various subscription alternatives entitling them to different privileges.

So, say the "Clubber" gets to "view" most of the stuff, but only "premium Clubbers" get to do downloads....

Djs get to do a few things, but are only allowed to upload their sound clips if they see more are "Premium DJs", etc.?

If this is more or less what you are thinking, AntonLV came out with a mod for D6 that is very good at keeping your user-types tidy (http://www.expertzzz.com/Downloadz/view/3322). You could go for something like this.

However, perhaps the simplest way to get started is to offer very few memberships and no user-types. For example: Clubber (free), DJ (premium, but allows x privileges), Band (+ expensive + privileges + higher disk space for uploads...), Sponsor (+ expensive + features such as advertising)?