The curfew has changed in steps, shortening then eliminating in places. Several days ago, curfew start time for Hua Hin went from 10pm to midnight. On the 11th, it was eliminated for 32 towns, Hua Hin included. Many on that list are tourist destinations. I suspect the others have factories or similar business with large work forces and which usually run 24 hrs.
Coup: Curfew Lifted in 32 Towns