J.F.
Why hide the "mommy pouch"? After four kids, no one's going to expect you to be a super model, but I understand wanting to look nice. :) I personally think that at six weeks you should be fine wearing something to cinch your waist, but make sure it's not so tight that it restricts blood flow. I'd call your OB/GYN just to make sure, but I think you should be fine. Have fun this weekend. :)