How does a member log out?

I have Membership installed on a Wordpress Site. When logged in there does not seem to be any place to log out.

I have tried pasting http://www.mydomain.com/wp-login.php?loggedout=true (as seen on another help thread I googled) into my browser but it doesn't seem to work. I remain logged in as my test user account.

I would like there to be a button or a link on every page where someone can log out (i.e. if they're using a public computer).

Suggestions?