That's an entirely different question than what you actually asked ("Who[m] do I name in the lawsuit?"). If you're suing a business entity, you don't name any particular individual on whom you plan to serve the lawsuit.I get it that I would have to sue the association but just didn't know who to serve physically.
If your local association is organized as a corporation or LLC, you can run a search here to get the name and address for the registered agent for service of process. If it's some other type of entity, review Article 4 of Chapter 4 of Title 5 of Part 2 of the Code of Civil Procedure ("Persons Upon Whom Summons May Be Served").*
* - There are no summonses in small claims cases, but the same service rules apply.