The ban, possibly taking effect by next March, would target what Bloomberg, already a leading crusader for clean living, calls a fatness "epidemic."
"There's an epidemic in this country of people being overweight, bordering on obesity. The percentage of people who are obese is skyrocketing," Bloomberg said in an interview on MSNBC television.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
The prohibition, which would not need city council approval, would restrict soda drink servings to no more than 16 ounces. That's more than a normal can, but only half the size of the biggest, bucket-like container that patrons commonly guzzle from in cinemas, sports arenas and other outlets.
The measure would target fast-food and other restaurants, delis, and places of public entertainment like stadiums. It would not cover drinks sold in supermarkets, or any diet, fruit, dairy or alcoholic drinks.
There was an immediate backlash against what Bloomberg critics see as an attempt to turn America's largest city into a nanny state.
Smoking has been banned in Big Apple offices, bars, parks and beaches, while mass transport is plastered with gruesome advertising against unhealthy diets. Artificial trans-fat is also outlawed and all bars and restaurants have been forced to display sanitary inspection grades in their front windows.
"There they go again," the New York City Beverage Association said in a statement.
"The New York City Health Department's unhealthy obsession with attacking soft drinks is again pushing them over the top. The city is not going to address the obesity issue by attacking soda, because soda is not driving the obesity rates," the industry organization said.
"These zealous proposals just distract from the hard work that needs to be done."
New York magazine complained of "heavy-handed" assaults on "many of life's most enjoyable vices." Comedy Central's www.indecisionforever.com site posted a blog titled: "Mike Bloomberg, Soda Jerk."
But the mayor, a billionaire former smoker, was not apologizing. "Sitting around and doing nothing and watching our kids getting fatter and fatter... that's just not something we should do as a society," he said.
He insisted New Yorkers could still down any quantity of sugar-laden drinks, but they would consciously have to buy a second cup.
"We're not taking away anyone's right to do things, we're simply forcing you to understand that you have to make the conscious decision to go from one cup to another cup," the mayor said.
As a result of ever-tightening rules on smoking, tobacco-related deaths have dropped. However, in a country where the average size of soft drinks 30 years ago was just six ounces, diet-related health problems are the new enemy, Bloomberg said.
In New York, "we're going to have more deaths from obesity than smoking," he said.
