The Mexican restaurant's premises licence owner Cuneyt Ozborme and designated premises supervisor Yavuz Ozborme appeared at Bromley Magistrates' Court on 11 and 12 November charged with allowing late entry and selling alcohol without food at the restaurant on April 28 and September 21 and 22 2012.
Although both defendants pleaded not guilty, magistrates determined they were and fined each of them £1,500 for allowing late entry and another £1,500 for selling alcohol without being accompanied by a main meal.
An additional victim surcharge of £300 and costs of £3,054 were also applied, leading to a total fine of £12,708.
Maureen O’ Mara, Royal Borough of Greenwich Cabinet Member for Community Safety and Environment said: "The case of High Chaparral in Greenwich shows that the Royal Borough acts decisively to bring businesses that fail to comply into line.
“Our town centres our exciting and vibrant places to socialise in and we will not tolerate irresponsible behaviour by businesses that could harm the enjoyment of members of the public.”