1. Any group of people that dress the same, act the same, and conform to the standards of their own "scene" which is usually based around music. Most scenesters are highly self-important jackasses and annoying teenagers. You can go from hardcore to breakbeats, and there is a scene for every different genre and sub genre of music. "Scene" does NOT necessarily refer to music that uses guitars, just go check out the drum and bass heads if you want proof.
2. A smaller measurement into which acts of a play are broken, usually based around a specific area. Most plays have 3 acts with 2-3 scenes per act.
1. You know i'd go to the show tonight but all the damn scenesters will be there acting too cool for their own good and i just don't like the vibe
2. Act II scene 3 of that play was a momentous performance, don't you agree?