Is the adjective order correct in the following sentences? And should I use comma in the first one?
1. ... I sat having a cold (,) long drink.
2. I was struck by the peaceful, cool, dark interior.

Question

Answer

Generally, the adjective order in English is:
Quantity or number.
Quality or opinion.
Size.
Age.
Shape.
Colour.
Proper adjective (often nationality, other place of origin, or material)
Purpose or qualifier.

Answer

1. I sat having a long, cold drink.
2. I was struck by the cool, peaceful and dark interior.