The charges faced by the former Another Level star, also known appearing on Celebrity Big Brother and for once dating Katie Price, related to an incident in Bognor Regis, West Sussex, in April last year.
Bowers was the headline act on the night in question when he shouted and swore at door staff who refused his brother entry to the venue where he had been performing.
The 34-year-old from Selsdon in Surrey had previously been charged with two counts of assault, but one was replaced by a public order offence which he admitted and the other charge was dismissed.
As well as the 12-month conditional discharge handed down at Chichester Magistrates' Court on Tuesday, Bowers was ordered to pay £85 court costs and a £15 victim surcharge.
David Symonds, chairman of the magistrates' panel, said: "It is so fortunate this incident did not escalate any further and it was restricted to abuse.
"The offence is still serious by the virtue of the fact it was directed at people who were discharging their legitimate duties and they are entitled not to be the target of such behaviour."
The DJ's brother Wade Bowers, 31 and from South Croydon, previously pleaded guilty to possession of cocaine but he denies three counts of assault. His case has been adjourned.
A third man - 35-year-old Terry Kean, also from South Croydon - also previously pleaded guilty to possession of cocaine. On Tuesday, he admitted the further charge of being threatening or abusive.
Like Dane Bowers, he received a 12-month conditional discharge and was ordered to pay £85 court costs for the public order offence. He was also fined £50 for the drugs offence and ordered to pay another £85 court costs and a £20 victim surcharge.
When trying to re-enter, a member of the door staff refused entry to Wade Bowers as he was unsteady and had been slapping the other two around the face outside the nightclub.
During the legal proceedings, the prosecution told the court that the confrontation had been sparked by the refusal to allow Wade Bowers into the club.
"Butlins was hosting an adults-only 90s-themed weekend and, as part of that weekend, Mr Bowers had performed as the headline celebrity act," David Lewis-Hall explained.
"Accompanied by brother Wade Bowers and Mr Kean, after he had performed that evening, he found himself outside the on-site nightclub Reds at 4.20am.
"Upon Wade Bowers being refused entry, Dane Bowers started to remonstrate with Mr Callaghan, getting in his face, shouting, swearing at him and demanding to see a manager.
"Mr Kean also gets involved and is acting in a similar way, shouting and swearing at security staff."
He added that, as Dane Bowers tried again to re-enter the club, he fell to the floor along with one of the door staff.
"Mr Bowers continued to act in an uncooperative manner with the door staff when he was on the floor and he remained held down by the door staff until the police arrived," Mr Lewis-Hall said.
Dane Bowers' defence lawyer James Brotherton said that the DJ had attempted to negotiate with the door staff over his brother's refused re-entry, but the situation had turned into an argument.
"He was the headline act over the weekend - it is to my surprise that he was not offered any security for the weekend there. He was left to his own devices, he was not assisted in any way to help him deal with fans or anything else," he said.
"He pleads guilty at the very first opportunity to the charge and he accepts the behaviour described. Clearly he has been stressed about the matter for some time."