Definitely check out Metagames and their respective Facebook page, lots of folks play in the back of the store and the employees would almost certainly be down to help find some groups for ya.

Sort of related, there is a group on face book called TOMAHOC which is more or less the "tabletop gaming in the Ozarks" group. A lot of the focus is on warhammer but you could definitely post a "looking for group" on there as well