It’s was more of a signature than a cue, you’ve probably picked it up amongst the early Eastern and Central musical bands where they dubbed their orchestras starting with an article ‘Les’

Zaire as the diffusion point, the trend was adopted by various groups and became common for bands to use the article ‘les’ and then name of a band most common the roots of the band, for instance a group of artists from Gatanga would go by ‘Les Gatanga’

‘Les’ is a French word which translated to English is ‘The’ which is an article which is used just before a noun.

Tracing it’s roots in Zaire, a francophone nation later spreading to other East African nation points out how Les became popular in English speaking nation’s.

Some bands leaders like Sam Kinuthia would creatively play with this fancy word to have Kiambogo Les Les

I also noted when you engage a former Rwengo brothers band trooper they will insist it’s THE Rwengo’s not just the plain Rwengo…

Other bands include;
Mukarara les les lead by Njoroge Ngarí
Orchestra Les Mt Kenya of Neffat Nduati
Queen Jane’s Queenja Les Les Band.