Police could not fault racegoers at the annual Cooma Races last Saturday.
Cooma police Sergeant Richard Nicholson said racegoers were well behaved.
"At the races, crowd behaviour was good and no offences were detected," Sergeant Nicholson said.
"However, after the races the behaviour was deplorable."
Sergeant Nicholson said in excess of 20 charges were laid for a range of alcohol related crimes at various hotels around Cooma.
Charges included failing to quit licenced premises, common assault, assaulting police, offensive behaviour, attempting to re-enter licenced premises when excluded, failing to follow police directions and resisting arrest.
One man was hit with $1100 worth of fines for two infringement notices - failing to quit licenced premises and remaining in the vicinity - within 50 metres of licenced premises, each carrying a $550 fine.
Sergeant Nicholson placed a dollar value on the offences at over $8000 worth of fines.
He blamed excessive alcohol consumption for behaviour of racegoers after the races.
"Next year police will look at banning alcohol consumption outside hotels on the footpath and enforce a 10pm lock out on race day," Sergeant Nicholson said.
Extra police were rostered on Saturday, with 12 police on duty to manage the race crowd.
"There were six police from Cooma, two from Platypus command [Bombala and Delegate and Nimmitabel] and four from the TAG team [Target Action Group] from Monaro Local Area Command," Sergeant Nicholson said.