Break out your spandex pants, your wild wig, flashy jewellery, anything else with glitter and sequins on, and cement on a loud layer of makeup — your chance to dress up as a ’70s glam rock alter-ego has arrived. ‘‘Ziggy’s Glam Rock Extravaganza’’ will be held at the Mayfair Theatre on Friday to commemorate the 10th anniversary of the death of the prince of glam rock, David Bowie. The concert is the brainchild of former University of Otago music lecturer Dr Ian Chapman, who is taking his Bowie-inspired performance persona Dr Glam off the shelf for a one-off concert, backed by Dunedin band The Oxo Cubans. ‘‘Although it is the 10th anniversary of Bowie’s passing, we decided to go beyond a Bowie-only show and incorporate wider glam rock, because it’s the musical style in which Bowie first came to prominence as Ziggy Stardust. ‘‘Hence, the repertoire includes songs from Alice Cooper, Sweet, Suzi Quatro, Kiss, Rocky Horror, T Rex and more.…