As full a schedule as can be posted for anything at any course within the club's purview, and beyond if you can. I'm talking leagues, tournaments, clinics, everything. And for each listing, a link to a flyer or a page with comprehensive info about that event (who, what, where, when, why, how much)...a one-click place to find all the pertinent info one needs to attend. Ideally, that link does not take you to a Facebook page/event or a forum thread. Those can be good supplements to an event listing, but it shouldn't be the primary way for people to get info. Don't make me wade through trash talk and speculation and guesswork to find out how much it costs or where I can sign up or what time the first round starts.
Beyond that, as much detail as possible about the courses in the area...pictures, scorecards, maps. Make it easy to find and navigate the courses in the area.