‘Sen’sation Riya at Hawaiian Shack Princess event. Hawaiian Shack is Mumbai’s little secret. This cozy, unassuming shack-like bar is a refreshing place to be in. Wooden logs in place of cement and bare bamboo strips for the internal decor, it is a replica of the authentic shacks in Goa and Hawaii. Lit by florescent blue and green light, it plays trendy and popular music and gets really congested as the night goes on.