Marcus has performed at venues and festivals across the UK including:
Tate Britain, Royal Vauxhall Tavern, The Cochrane Theatre, Rich Mix, Birmingham Pride, The Cockpit Theatre, Phoenix Artists Club, Leicester Square Theatre, Hoxton Hall, Purcell Room, Hope and Anchor, Royal Festival Hall, Charing Cross Theatre, St Davids Hall (Cardiff), Secombe Theatre, Bethnal Green Working Mens Club, Madame JoJo’s, The Black Cap, Glasgow School of Art, Summer Rites, Soho Theatre, HowTheLightGetsIn, Hill Street Theatre (Edinburgh), Chats Palace, Birmingham Hippodrome, Hackney Empire Studio, Stanley Halls, Contact (Manchester), Lion & Unicorn, Chelsea Theatre, Stanley Halls, Rosemary Branch, Earl Haig Hall, London Wonderground, The Troubadour, Drill Hall, Twentieth Century Theatre, O2 Islington 2, Junction (Cambridge), The Glory, Arcola Theatre, London Pride.
As part of London's alternative cabaret circuit he has performed alongside such luminaries as David Hoyle, Dickie Beau and Jonny Woo, sung in Our Lady J’s gospel choir at Soho Theatre and supported RuPaul’s Drag Race star Adore Delano at The Meth Lab. Through Southbank Centre's Voicelab, he has performed with Mercury Music Prize winners Elbow, jazz improvisation icon Bobby McFerrin, beat boxer Shlomo and UK jazz legend Ian Shaw in choirs led by Dom Stichbury, Laka D and Mary King. More recently, he joined a star studded celebration of David Bowie at Union Chapel which also featured Glen Matlock, David McAlmont, The Magic Numbers and Dan Gillespie Sells of The Feeling, and supported Tom Robinson at a fundraiser for the Russian LGBT Network.