Glee fans are well catered for in this mash-up of thematically-arranged medleys, but the laughs come thin and slow. Frontman Ray Gun is an emphatic performer, tucking into lead vocals with relish, but his cat costume is a gimmick that long outstays its welcome, existing only to serve a laboured set of puns.

Assembly George Square, 623 3030, until 29 Aug, 6.40pm, £9.50–£10.50 (£8.50–£9.50).