(somewhat dated) to take one's business elsewhere, to take one's custom elsewhere (to go elsewhere, especially in another restaurant, bar, etc.)

Alternative spelling of changer de crémerie

(informal) to have a change of scenery, to get a change of air

(figuratively) to change sides, to box the compass / (figuratively) to switch teams (to change one's sexual orientation)

(informal, figuratively) to change one's tune, to start singing a different tune

to change one's attitudes; to change one's tune

to change horses in midstream