This NYT story looks at the growing clash between those with kids and those without when they intersect in the public space of restos -- a problem that's worsening as young couples choose city living over the 'burbs.

An excerpt:

Bridget Dehl shushed her 21-month-old son, Gavin, then clapped a hand over his mouth to squelch his tiny screams amid the Sunday brunch bustle. When Gavin kept yelping "yeah, yeah, yeah," Ms. Dehl whisked him from his highchair and out the door.

How should restaurants and coffee houses respond to parents whose children are unruly? Right past the sign warning the cafe's customers that "children of all ages have to behave and use their indoor voices when coming to A Taste of Heaven," and right into a nasty spat roiling the stroller set in Chicago's changing Andersonville neighborhood.

The owner of A Taste of Heaven, Dan McCauley, said he posted the sign - at child level, with playful handprints - in the hope of quieting his tin-ceilinged cafe, where toddlers have been known to sprawl between tables and hurl themselves at display cases for sport.

But many neighborhood mothers took umbrage at the implied criticism of how they handle their children. Soon, whispers of a boycott passed among the playgroups in this North Side neighborhood, once an outpost of avant-garde artists and hip gay couples but now a hot real estate market for young professional families shunning the suburbs.

"I love people who don't have children who tell you how to parent," said Alison Miller, 35, a psychologist, corporate coach and mother of two. "I'd love for him to be responsible for three children for the next year and see if he can control the volume of their voices every minute of the day."

Mr. McCauley, 44, said the protesting parents were "former cheerleaders and beauty queens" who "have a very strong sense of entitlement." In an open letter he handed out at the bakery, he warned of an "epidemic" of antisocial behavior.

"Part of parenting skills is teaching kids they behave differently in a restaurant than they do on the playground," Mr. McCauley said in an interview. "If you send out positive energy, positive energy returns to you. If you send out energy that says I'm the only one that matters, it's going to be a pretty chaotic world."

And so simmers another skirmish between the childless and the child-centered, a culture clash increasingly common in restaurants and other public spaces as a new generation of busy, older, well-off parents ferry little ones with them.