MUSIC Penrith Youth Orchestra performs its first showcase concert as the 44 young musicians play alongside their mentors from the Australian Chamber Orchestra and Penrith Symphony Orchestra. The afternoon's program includes compositions from Schubert, Tchaikovsky and Bizet. 3pm, Joan Sutherland Performing Arts Centre, 597 High Street, Penrith, $15, thejoan.com.au.

STAGE Workhorse Theatre Company put on a production of Enda Walsh's 2006 tragicomedy The Walworth Farce (until June 9) in which a father and his two sons endlessly re-enact the story of how they left Ireland and ended up in a shabby flat in London. 5pm, Kings Cross Theatre, 244-248 William Street, Kings Cross,$25, workhorsetheatreco.com.

MUSIC Radnor and Lee, the acoustic folk duo made up of How I Met Your Mother actor Josh Radnor and Aussie singer-songwriter Ben Lee, play tracks from their self-titled debut album on their first-ever east coast tour. 7pm, Metro Theatre, 624 George Street, city, $59.90, ticketek.com.au.

MUSIC Spanish outfit La Pegatina blend rumba rhythms with ska for a party-starting live show. Their most recent album, Ahora o Nunca, drew lyrical inspiration from Hermann Hesse's novel of self discovery Siddhartha. 8pm, Max Watts, Entertainment Quarter, 122 Lang Road, Moore Park, $51, maxwatts.com.au.