Lamplighters Music Theatre presents Gilbert and Sullivan's fun tale of fairies, half-fairies (which half?), a dim-witted ruling elite, and their ineffective political absurdities. "Lolanthe" shows Friday, Aug. 2-Sunday, Aug. 4 at Lesher Center for the Arts (1601 Civic Dr., Walnut Creek). Cost is $20-$54. Contact 943-7469 or firstname.lastname@example.org, or go to http://lamplighters.org/season/season.html.