When Koichi made that comment, everybody in the western style room froze.
This western style room looks strangely familiar, though I know I've never been here before.
My room is a western style room, about ten square meters, with my favorite color of light blue on the walls.
A Western style room is a Western style room. We're talking something that's not a tatami mat filled room. Good to know this word if you're staying in hotels or ryokans and prefer not to sleep on a futon, etc.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.