0Ok grammatically, but we don't really say that people 'do their business'. operates his business? opens his business? or 'He does business until midnight' is ok.0-
0 Be careful with this one --in the U.S., you might say "take the dog for a walk and don't bring him back until he 01i00does his business 02i00-- and be sure to clean up after him! 0-
0But more 01i00natural02i00 is "His business is open until midnight" or "He keeps his business open until midnight."02br 02br 00I would avoid "does his business" for the reasons mentioned above. The euphamism was the first thing that came to mind when I read it.0-