An American tech startup that once prided itself on being a fun place to work and play has had enough: no more drunken sex in the stairways of Zenefits, please! An e-mail went out to employees of the health-insurance brokerage this week asking they please tone down their frat house behaviour at all U.S. offices. "Cigarettes, plastic cups filled with beer, and several used condoms were found in the stairwell. Yes, you read that right. Do not use the stairwells to smoke, drink, eat, or have sex," the e-mail says, according to the Wall Street Journal. Zenefits has hit hard...