The former Boyzone star is playing a busker in hit musical Once.
The actor reprimanded a member of the audience who left their mobile phone on during the opening night of his one-man show in London.
Inspectrors say the cafe posed a serious threat to anyone eating there.
Police say Alvin Ricketts was "truly brazen", wearing a variety of flamboyant hats and dinner scarves around Soho.
The senior officer leading the operation, Detective Chief Superintendent Kevin Southworth said:
"Alvin Ricketts was one of a group of drug dealers arrested as part of Operation Rense who congregated in Soho. Ricketts was truly brazen in his offending, wearing a variety of quite flamboyant hats, dinner scarves and other outfits that made him stand out.
"The 74-year-old would regularly travel from his sheltered housing accommodation to sell class A drugs in the heart of the West End."
A pensioner who left his sheltered housing to deal crack on the streets of Soho has been jailed for two years. 74-year-old Alvin Ricketts from north London pleaded guilty to two counts of supplying crack cocaine. He was also handed a five year ASBO.
Alvin Ricketts was one of 38 drug dealers convicted and jailed for more than 70 years in total under a major crackdown on drugs around Soho.
The Soho-based makers of Candy Crush appear to have ambitious plans for expansion with an expected floatation on the Nasdaq exchange. The Daily Telegraph reports the game's creator, King, could be valued at more than £3 billion.
If the floatation goes ahead, it will be one of the biggest of any British technology company.
A group of dealers who plagued the streets of Soho with drugs have been jailed for more than 60 years. Their trials came after a major investigation by Metropolitan Police who caught the gang in action on CCTV.
Ronke Phillips reports:
Four men have been jailed for a total of 62 years after dealing heroine and crack cocaine in Soho, central London as part of a major sustained crackdown on drug and associated crime in the area.
A total of 32 defendants have previously been jailed as part of the second stage of Operation Rense by Westminster officers.
The latest convictions represent several months of intensive targeting of Class A and B dealers in Soho and the West End with 43 suspects arrested in May 2013.
An unlicensed minicab driver has been jailed for more than seven years, for raping a woman after driving her home.
Mohamed Hacene Chaouch aged 46, had been touting for passengers in Soho, when he picked up his victim, who had been on a night out with friends.
He attacked her outside her home address after she fell asleep in the car.
Police say they are working to crack-down on illegal minicabs and are warning people to stay clear of unlicensed operators.
Police have now arrested 28 suspected heroin and cocaine dealers who operate in Soho as part of a major sustained crackdown on street crime in the area.
Last week Officers made a series of arrests during raids on dealers' home addresses in dawn swoops.
Now a further three people have been arrested for breaching the terms of their ASBOs and one arrest was made in relation to an assault in Soho.
Officers have now arrested 25 suspected heroin and cocainedealers in their crackdown on drug dealing in Soho.
A further three people were arrested for breaching theterms of their ASBOs and one arrest was made in relation to an assault in Soho.
Police have now arrested 23 suspected heroin and cocaine dealers who blight the streets of Soho in the latest phase of a major sustained crackdown on drug and associated street crime in the area.
Officers from Westminster swooped on suspects operating in the very heart of the West End last night, following an extensive intelligence led operation into the supply of class A and B in and around Soho.
The latest wave of arrests come just weeks after the final sentencing of 30 drug dealers who were jailed for a total of 100 years after they were arrested during the first stage of the crackdown in May 2012.
ASBOs have been secured against many of the 30 convicted which prevent them from re-entering the area on their release from prison.
In addition, a further 32 drug dealers and users have had ASBOs secured against them, banning them from large areas of Westminster.
Officers arrested 23 suspected drug dealers and three people on suspicion of breaching anti-social behaviour orders in the first stages of the operation.
More arrests are expected in the coming days.
Commander Alison Newcomb from Westminster borough said:
"Drug dealing on the streets of the West End or in any part of London can not and will not be tolerated. Put quite simply, if you are coming to the West End to buy or sell drugs, you need to think again."