Usually, the kids will only buy a drink, and the free refills keep them going all night, she says.

WSJ: For the Internet-Deprived, McDonald's Is Study Hall

In the days before automation, the lighthouse keeper had to stay up all night to keep the lights burning.

BBC: Canada��s greatest cycling trail

More than 100 Derbyshire schools have shut and Derbyshire County Council said gritters had been out all night to keep the main roads clear of ice.

BBC: Derbyshire schools and travel affected by snow

Barely a woman with only a song, I sang to keep you smiling and held you all night long.

NPR: Judy Collins, From Both Sides Now

And the governor's race could keep the politicians and the journalists up all night.

ECONOMIST: And who will cut the victory?

Their teams work and operate all night as the patients keep coming.

BBC: E-mail: Picking up the pieces

What NBC needs is an unshakable night to heavily promote its lukewarm newer shows (Up All Night, Whitney) and keep its loyal audiences for solid-but-aged The Office and 30 Rock.

FORBES: 'Smash': A Fresh Start For NBC, Or A Swan Song For Music Shows?

After all, night workers sacrifice their own health to keep our 24-7 society running safely, facing increased risks of cancer, hypertension, heart disease, hormonal disruption, obesity, diabetes, depression and occupational injury due to sleep deficiency and chronic occupational jet lag.

CNN: FAA knew controllers nap, ignored fatigue issue

Now that there are such sophisticated ways to keep people out, all we need is an effective system for keeping teenagers in at night.

FORBES: Platinum Protection

While billionaires can afford to hire scores of people to manage their affairs, they may still have to make all the important decisions themselves, decisions that could keep them up in the middle of the night.

FORBES: 3 Things Billions Cannot Buy