Christopher Richards, along with usher George Taylor and two others, stole booze, computers and DVDS worth nearly 23,000 pounds and caused damage worth 24,000 pounds during the burglary, the Mirror reported.
A court heard that six months ago, club boss Catherine Murphy gave the 25-year-old and his partner, Bridie Sparks, a half-price champagne buffet as the couple were broke.
In a statement to Burnley crown court, Catherine, 34, said that she was “tortured” by the betrayal and she also tried to kill herself.
Richards surrendered himself after CCTV caught him in the act at the Hub Club, in Bacup, Lancashire.
Judge Jonathan Gibson told the court that it was the most dreadful offence of commercial burglary, which left the owner devastated.
But pregnant Sparks, who was herself jailed for assault in 2011, said that she will stand by her husband.
Bridie, who has two children with Richards, will give birth to his third while he serves a six-month sentence.