Which is not a theme based restaurant in the following choices??

Copper Chimney is a traditional Indian restaurant chain known for its cuisine rather than thematic decor or storytelling elements. In contrast, 'Once upon a Pirate', 'Rainforest', and 'Caves' are all examples of theme-based restaurants that create immersive experiences through elaborate decor and atmospheres. Copper Chimney focuses on authentic North Indian cuisine in a more conventional restaurant setting.