People who live in the same household can sit at the same table with no mentioned limit.
As for what your indoor dining experience will be like, note that the purchase of alcohol must be accompanied by food. So, if you're hoping to get a glass of sangria, you'll also have to have a little snack with it.
Masks must be worn in the restaurant at all times, except while drinking and eating. When entering and exiting the restaurant, you'll need to make sure you have your mask on.