The phrase "mob scene" refers to a chaotic situation where a large group of people gathers and becomes rowdy or out of control. It can describe a situation where there is a lot of noise, confusion, pushing, and shoving. Full definition
There's nothing more to it, no need to coordinate with teammates or anything as sophisticated as that; just a basic mob scene of ships shooting at each other. (gamerstemple.com)
Mob scene at City Hall as tennis star James Blake arrives to meet the mayor. (nymag.com)
Let's go back to the hot pink and neon orange example: If your book is a murder mystery set in the gritty 1980s New York City mob scene, do those colors really make sense? (webdesignrelief.com)