How to lock a bi-folding bathroom door?

I hate these folding doors! They are all over my house and every single one of them breaks constantly. Is there another kind of door I can easily replace them with?

Bathroom Progress: Bi-fold Closet Doors Installed As Double Doors - Addicted 2 Decorating®

How to lock a bi-folding bathroom door?

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eModernDecor CozyBlock Privacy Door Lever Handle Brushed Nickel Finish Easy to Lock and Unlock for Bedroom and Bathroom (Set of 2) EDL-902-PL-BN-2 - The Home Depot

eModernDecor CozyBlock Privacy Door Lever Handle Matte Black Finish Easy to Lock and Unlock for Bedroom and Bathroom (Set of 1) EDL-902-PL-BLK-1 - The Home Depot