But he often hosts guests, usually Iranian dignitaries and fellow terrorists.
Their meetings almost invariably take place in front of....curtains.
This week he hosted Iran's foreign minister:
With Hamas leader Haniyeh:
With Iran's foreign minister Zarif:
And other meetings with Hamas, Lebanese and Iranian officials:
These curtains do not cover windows. There is not a hint of light coming from behind them, which one would see if the meeting is during the day even with blackout curtains.
The only exception I could find was this photo from 2006, before Nasrallah's panicked descent into the bunker beneath Beirut, where you can see the flash of the camera reflect off the window behind a thin curtain:
His hideout is clearly very large, with multiple rooms.
When you live your life like a rat underground, any bit of self-deception helps.