BuddyPress.org

My client wants an affiliate site to sell products. There will be a storefront and a backend affiliate program. They also want BuddyPress installed for social networking, but from what I can understand (sometimes they’re not super clear) they do not need/want their affiliate to have their own blogs within the site. So my question is, do I really need to install WPMU (or whatever it’s called now) or can I just do a regular WP install?

I should also mention that the main area where we need BuddyPress installed would be something like theirsite.com/righthere, rather than the root.

Thanks!