The last drive-in movie theater in metro Denver — the 88 Drive-In at Commerce City — is closing. And instead of a red sign shaped like an arrow and flickering Hollywood fare, drivers rolling past the theater, located in the relatively affordable Irondale neighborhood, may soon see an 80,500-square-foot industrial warehouse touted as an appealing amenity. The local owner of the theater at 8780 Rosemary St., has decided to close it after showing movies since 1976.