Share a lunchtime meal with Chi Omega sisters at Mezza Grille, a new American Mediterranean Fusion restaShare a lunchtime meal with Chi Omega sisters at Mezza Grille, a new American Mediterranean Fusion restaurant on Westheimer. Dutch-treat…stop by for a few minutes or stay a while, whatever suits your schedule!urant on Westheimer. Dutch-treat…stop by for a few minutes or stay a while, whatever suits your schedule!