The Dukes

As far as I know there is no The Dukes restaurant in Bangkok, although there are several branches in Chiang Mai. If you haven't been there, it is an almost perfect recreation of a US Big Boy or similar restaurant, down to featuring things like Patty Melts and ice cold water in glasses when you sit down. Anybody know if they have plans to expand southward? BTW, one of the locations is in front of an outfit selling antique/vintage architectural items from India/China and you can wonder those premises.