Bence Bodak also confronted a worker and attacked the entrance doors of Etap premises in broad daylight.
The 23-year-old was spared being placed on the sex offender register for his actions last month.
Bodak, a Hungarian national living in the Andersonstown area of the city, admitted to attempting to commit criminal damage, common assault, disorderly behavior and indecent exposure with the intent to cause alarm or distress.
Belfast Magistrates’ Court heard he was heavily under the influence of alcohol or drugs during the incident at the Etap Hotel on Dublin Road on February 10.
Bodak was not a guest but due to disturbances a request was made to leave the premises.
“He refused, acted aggressively towards those asking him to leave and had to be physically removed,” a crown attorney said.
“He came back and started kicking and punching the front doors.
“He then loosened his jeans and exposed his penis to the staff.”
Bodak continued to insult police on the street, the court heard.
The incident, which lasted about 30 minutes, was filmed by CCTV.
Defense attorney Pearse MacDermott said: “His behavior was ridiculous, he accepts it.”
He explained how Bodak had developed a drug problem during his ten years in Northern Ireland.
“He’s a young man who needs help,” Mr MacDermott said.
Imposing four months in police custody, District Judge George Conner added an additional month for violating previous sentences.
But deciding not to put Bodak on the sex offender registry, he decided, “I don’t think this is a case that deserves that.”
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