Marietta, GA-- Some trace the beginning of the foam party back to a 1932 movie short where musician Louis Armstrong performed in a sea of soap suds.
Whatever its origin, it's all the rage in many nightclubs around the world these days.
Often scantily clad dancers move to music as tons of foam suds pour over them.
Most of the time it's perfectly legal fun, but Marietta Police have put out a warning to parents of underage teens who join in especially girls.
A police officer in Georgia told WFMY News 2's sister station WXIA in Atlanta, the parties are very dangerous.
"There's really a lot going on that's actually very dangerous to the kids," Marietta Police Officer David Baldwin told 11Alive News.
His department is concerned because they've had several reports of partially dressed underage girls being taken advantage of.
Baldwin said many foam parties are advertised as "teen" parties, but take place in regular adult nightclubs where alcohol is still served.
Some Marietta nightclubs have signs on their doors saying no one under 21 is allowed in.
But an April first party at a Marietta event hall was advertised as an "ABC Foam Party" (anything but clothes) and bragged "No ID Required".
Officer Baldwin said they've been called to such parties where rival gangs turned up and trouble broke out.
"It almost always leads to violence in some form or fashion and typically there are weapons that are produced and used at these teen parties as well," he added.
Police urge parents to keep track of where their underage teens are going and what they plan to do when they get there.
Officer Baldwin added that police will answer any trouble calls at such parties, but often don't arrive until something bad has already happened.