The Florida Department of State's great web site, Sunbiz
, doesn't provide for registration of associations. Under "choosing a legal structure" it lists sole proprietorships, partnerships, LLCs and corporations as the possibilities.
What you may end up with is a copy of a fictitious name registration, "H & W Association." That will not establish the organization as a legal entity. It will simply indicate H & W are doing business under a fictitious name.