If you are the frequent customer, like every month you will visits 3~4 times, you need to join the hotel dining club. If 1 year only less than 5 visits, I think it will not be worth it.

Usually it will cost around < 1k per annum the membership. The membership comes with some complementary stay x 1 day, buffet dining x 1 ~2 times for 2 pax, walk in dining discount up to 20~30%.