This is one of my first maps. It is not 'vis'ed, as I wasn't sure if it merited taking the time to do so. It a CS hostage rescue, based in a small school.
(edit) Updated map. Screenshot is now fullbright, but actual game is not (jpg took a few took many liberties with the colors when it was dark)
This map definitely gives me the feeling that It's a school, which is great. I like the auditorium and the gymnasium, but they could both use some more detail work and props to make them look nicer.
The red emergency lights are appropriate, but you should make some props that look like emergency lights, and then make that texture a textlight. Only use pointlights if you need an effect like blinking or flickering.
I understand the high r_speeds in the aud, considering all the nice chair props :), but the r_speeds are in the 1500s in the hallways too. A properly placed hint brush or some redesign might help. For a multiplayer game, you should try to keep the r_speeds as low as you can, but since everybody has faster machines these days, I'm not really sure what limit you should set for yourself. I try to keep wpolys below 1000 personally...
LoL having the bomb by the hosties is interesting...
You might want to add some lockers and other detail items/props to make it more school-like.
All in all a very good start. I like the layout, and general feel to the map.