Police have charged an 18-year-old with having a can of drink as an offensive weapon at a Hampshire party advertised on the Facebook social networking site.
Three teenagers have been charged after a fight broke out when more than 100 people gatecrashed the event in July.
Ashley Pemberton from Farnborough is charged with affray and having the can as an offensive weapon.
He, Keith Berger and James Mahabeer are all on police bail before facing court on 29 October.
Mr Berger, 18, of Oaken Copse Crescent, Farnborough, is charged with two counts of using words or behaviour to cause someone to fear unlawful violence.
Mr Mahabeer, 18, of Cambridge Road, Aldershot, is charged with affray.
A Hampshire Constabulary spokeswoman said no further action would be taken against a 19-year-old arrested at the scene, and a 17-year-old boy was fined £80 for using threatening words and behaviour to cause harassment, alarm or distress.
It took police from Hampshire, helped by dog handlers from Surrey, an hour and a half to disperse the crowd of partygoers.