The package includes a cup of specialty drinks, which is not optional, and there is a self-service salad, and appetizer soup, the default cream of mushroom soup, can be replaced with corn soup, a package to send two small round bread, can be replaced with French sliced. As for the steak, the default side dish in the steak is pasta, which can be swapped for mashed potatoes, and the default soup is black pepper sauce, which can be swapped for tomato or herb sauce. Some Hawker's clerks will ask carefully, some will just serve the default dish. When it comes to seasoning, sometimes there is no carrot, and when you add mashed potatoes, there may be no broccoli.
Hawker is a popular steakhouse, so you'd be better off ordering it rare yourself, but don't count on the chef's skills to satisfy you - it's usually either burnt or too rare.
It seems that there is no credit card spending, I don't know how it is in other cities, I don't know how it is in the two cities where I live, Wenzhou and Wuhan, I haven't seen any credit card spending.