Never heard of mambo?
Isn't mambo a kind of music or dance coming out of South America?
What does mambo make you think or feel? Go with what you know. Asking people who have no clue or interest isn't likely to get your dream site built. You will need graphics and while you are deciding on content, you can be busy working on those. (A defintion of mambo might be a good place to start)
You can always start out with the basics, and then have a section in the forum for site feedback and requests for forum additions.