What are your choices?
Currently there are two: The one in Kuala Lumpur is called Nescafe M-Junction Drive-In Cinema and is operated by TwoSpicy Entertainment Live and MD Events Asia. Located along Jalan Ampang, patrons' experience will also be complemented with a view of the KL skyline.
The only other alternative is located all the way up north in Ipoh, and it's called Casuarina Sini-Drive that accommodates up to 70 vehicles at one time.
See also: 5 Tips For A Stress-Free Cinema Outing During RMCO