Answer:
The first passage only gives us a general idea. We all know what a pub usually looks like. We know now how many people are doing what and what happens when the door opens. But that's all.
The second passage, on the other hand, offers us precious details. We know what the pub really looks like, what sort of atmosphere it has. We know the men's appearances and we get more detail as to what happens when David and Jack come in. The men don't simply stare at them, but do so in a not friendly way, making them uncomfortable.
That is what sensory language is for: to allow us to see, feel, smell, etc. the scene. Sensory language, as the name suggests, appeals to our senses, providing us with the necessary information to truly imagine the scene completely.
Step-by-step explanation: