Justin Bieber -- Where There's Smoke ... (PHOTO)

Justin Bieber grabbed a smoke outside the Bev Hills hotel where he lives ... and it's fun to guess what the hotel employee is thinking.

The photog who shot the pic claims Bieber was asked not to smoke near the front door. But whatever was said, you can be sure the staffer tred lightly, because Biebs spends a fortune at the swanky joint.