In writing, I've recently had to remind myself to use all five senses as often as I can. I just had my characters cross a huge common area. Guess what I forgot? Sound! Yeah, I didn't do taste or smell either. I did do a little tactile stuff. But the sound would be as important as the sight. Sound will define what sort of crowd this is, and what the general mood is. Angry crowd give anyone the creeps? Does me! Laughing singing dancing crowd make you want to join in or wonder what the celebration is all about? Busy noisy cranky crowd suggests a typical day in downtown, right? So there we are, and there in the story we weren't. Going generic will allow the reader to create their own stuff via their imagination, but a few specific things will help lead them in a potentially more interesting direction and can suggest culture stuff in the process.
Back to the keyboard-y salt mines. If I don't post before then, I wish everyone a very happy Thanksgiving Day. Drive safe.