Thanks Tim, really appreciate you taking the time to reply. I tried your suggestion, but I'm still getting the same result.
I've set the Posts page is set to s2Member Level 1, but non-members can still view the Posts page (ie, they can see all of the posts listed, but can't click through to read the posts).
I would like to ensure that non-members cannot click through to the Posts page, but that the menu is still displayed to non-members.
To give you some background, people who visit the site don't exactly understand what it is they they get with their membership. I would like all of the menus that are only available to members to seen by non-members, but disable their ability to click on those pages (ie, if they click on the Posts page, it just sends them to the Join page).