Cause even though I'm a professional, I like to do my work at home
As said in a previous annotation, a cabaret is a show of dancing, singing or light entertainment. Justin Timberlake is indeed a professional at singing, dancing and entertainment, having cemented his reputation as a solid entertainer, a good actor AND a comedian.
However, he prefers to show his skills/moves in bed with his woman, and we can understand that.
To help improve the meaning of these lyrics, visit "Cabaret" by Justin Timberlake (Ft. Drake) Lyrics and leave a comment on the lyrics box