The transport PCSOs were punished over a clip of them doing their own version of the internet dance craze which was posted online in February.
The footage shows one officer in a crash helmet dancing alone, before his colleagues start wildly prancing around.
Six PCSOs received written warnings over the video, which was filmed on police premises and is entitled Metropolitan Police Harlem Shake, while a seventh resigned.
That officer was facing gross misconduct proceedings over a number of issues including the video.
A Metropolitan Police spokesman said: "The MPS does not condone unprofessionalism in the workplace.
"We expect high standards from all our staff. Appropriate misconduct procedures have been taken regarding those involved and the matter is now closed."