"I mean sometimes I don't see or hear from them for days, " Zager says.

NPR: The End Of 9-To-5: When Work Time Is Anytime

Craig Zager of Coldwell Banker Previews of Zephyr Cove represented the smaller property's seller, the Red Roberts Trust.

WSJ: Miami Condos Sell for a Record $34 Million - WSJ Private Properties

"Here's another one, empty, " says supervisor Ann Zager as she guides me among vacant chairs and black computer terminals.

NPR: The End Of 9-To-5: When Work Time Is Anytime

Zager has figured out that she needs only five or six staffers at a time to handle face-to-face client meetings.

NPR: The End Of 9-To-5: When Work Time Is Anytime