In sci.electronics.repair Arfa Daily wrote:
I am talking about 'a disco (theque)' as in a person or persons who
set up music and lighting equipment in a venue for the purposes of
providing the musical entertainment for a dance event, or a birthday,
or a works celebration, or a charity do, or whatever.

In the US this is usually called a "mobile DJ" service. "Mobile"
because they come to your location with records, amps, speakers, etc.
DJ means "disk jockey" - a person who selects and plays recorded music.
People will say things like "We should hire a DJ for the party."

The DJ has usually brought amps and speakers and maybe some lights. He
(most common) or she (sometimes) used to bring a stack of (records|tapes|
CDs) and a (turntable|tape deck|CD player). Today the music comes from
a laptop or MP3 player, but everything else is the same.

By itself, "DJ" can also be the person that works at a radio station,
introducing songs and playing them. A "DJ" can also be the person in
a hip-hop group who plays records to back up the singer.

If you are talking about a building where people go to listen to
recorded music, dance, and probably drink alcohol, that's usually called
a "club" or maybe a "bar". It was called a "disco" in the 1970s but not
any longer.

As you have probably figured out, if you say "disco" in the US today,
people generally think of the late 1970s music style - "Saturday Night
Fever", etc.

Matt Roberds