After groping and punching his victim at the Soho Revue Bar, breaking her nose, King briefly returned to Hull before spending a subsequent spell on loan at Middlesbrough in January.
There were about 30 students taking the class, which was run by April Wachtel, who has been tending bar for the past decade and now works at Soho's Lani Kai and Brooklyn's Lot 2.
Another popular newcomer is Poke, run by Californian chef Mychael Henry at the bar and restaurant Magdalena's Party in the Palermo Soho neighbourhood every Wednesday from 8:30 pm until midnight.