Zam Zam is a renowned restaurant in Singapore, famous for its flavorful and generously portioned Indian-Muslim dishes like murtabak and biryani. It offers a lively, authentic atmosphere near the Sultan Mosque, attracting locals and tourists alike. While the food consistently receives praise for its taste and value, experiences with service vary, with some patrons reporting rude staff or inconsistent quality. The restaurant's rich history and diverse menu make it a popular choice, though it can be crowded during peak hours, and some concerns about cleanliness and additional charges have been noted.