Sunday

Antic aesthetics In Yasmina Reza's episodic comedy Art, three friends find their longstanding bond strained when one buys an abstract, completely white painting. As they argue about its artistic value, the cost of their friendship becomes the true subject of the piece. The show goes on at 2 p.m. Sunday at Act II Playhouse, 56 E. Butler Ave., Ambler, and continues with shows at 2 and 8 p.m. Wednesday, 8 p.m. Thursday through Saturday, and 2 p.m. next Sunday. Tickets are $22 to $33. Call 215-654-0200.

Love and conflict Based as much on news photographs of the evacuation of South Vietnam in 1975 as it is on Puccini's Madame Butterfly, Claude-Michel Schonberg and Alain Boublil's musical Miss Saigon tells the story of a soldier and a bar girl brought together and then separated by the war, and their efforts to find each other. The Tony Award-winning show goes on at 2 and 7 p.m. Sunday at the Walnut Street Theatre, 825 Walnut St., and continues on a Tuesday-through-Sunday schedule to July 17. Tickets are $10 to $95. Call 215-574-3550.

Bat man Johann Strauss' Die Fledermaus is an operetta masterpiece, a frothy tale of assignations, disguises, mistaken identity, and general misbehavior in 19th-century Vienna. The Center City Opera Theater presents the work at 3 p.m. Sunday at the Ethical Society Building, 1906 Rittenhouse Square. Tickets are $10 to $49. Call 215-806-0194.

Monday

Holiday treat Usually closed on the first day of the week, the Philadelphia Museum of Art will be open from 10 a.m. to 5 p.m. on all holiday Mondays this year, including Memorial Day, which offers a chance to see the exhibition Roberto Capucci: Art Into Fashion before it closes next Sunday, and the sensational Paris Through the Window: Marc Chagall and His Circle, which closes July 10. The museum is at 26th Street and the Benjamin Franklin Parkway. Admission is $16; $14 for seniors; $12 for students; ages 12 and under free. Call 215-763-8100.

Tuesday

Local heroes Two bands driven by meaty guitar chops are both Philly transplants: the blues-rock quartet Gray Fox (via Alaska) and the pop perfectionist Viv and the Revival (via France). They share a bill at 8 p.m. at the North Star, 2639 Poplar St. Tickets are $7. Call 215-787-0488.

Thursday

Who's who In Oscar Wilde's comedy The Importance of Being Earnest, two young gentlemen adopt other names for the purpose of avoiding Victorian mores, a ruse that grows more complex when one takes the guise of the other. A film of the Roundabout Theatre Company production screens at the County Theater, 20 E. State St., Doylestown, at 7 p.m. Thursday, and 12:30 p.m. next Sunday. Tickets are $18. Call 215-345-6789. The film also screens at the Ambler Theater, 108 E. Butler Ave., Ambler, at 7 p.m. Thursday, and 12:30 p.m. June 12.

Season finale Sir Frederick Ashton's pastoral romance La Fille Mal Gardée closes out the season for the Pennsylvania Ballet at the Academy of Music, Broad and Locust Streets, with performances at 7:30 p.m. Thursday, noon Saturday, 2 p.m. next Sunday 7:30 p.m. June 10, and 2 p.m. and 8 p.m. June 11. Tickets are $20 to $139. Call 215-893-1999

Friday & Saturday

Game of death In Eytan Fox's 2005 thriller Walk on Water, a Mossad assassin who befriends two young Germans in order to find and kill the tourists' aged and ailing grandfather, a Nazi war criminal, finds his loyalties and sense of self beginning to fray. The film screens at the Peace Center of Delaware County, 1001 Old Sproul Rd., Springfield, at 7 p.m. Friday. Admission is free. Call 610-544-1818.

Cool country Singer Laura Cantrell, a pretty cool country girl herself, pays tribute to honky-tonk angel Kitty Wells on her new album. She plays at the Tin Angel, 20 S. Second St., at 7:30 p.m. Friday. Tickets are $12. Call 215-928-0770.

Remembering Grover A quartet of Grover Washington Jr. sidemen - percussionist Doc Gibbs, violinist John Blake, bassist Tyrone Brown, and pianist Bill Meek - is joined by guest artists to pay tribute to the great saxophonist at Chris' Jazz Cafe, 1421 Sansom St., at 8 and 10 p.m. Friday and Saturday. Tickets are $20 per show ($25 early show Saturday). Call 215-568-3131.

The art of war Partially paralyzed as a child (most likely due to polio), the 19th-century artist William B.T. Trego could barely hold a brush and had to move his entire body to mix his colors. Yet he created rich and detailed battle scenes from the American Civil War and the Franco-Prussian War, painted from staged reenactments using uniforms and weapons from his collection. The exhibition So Bravely and So Well: The Life and Art of William B.T. Trego, a collection of the artist's works, is at the James A. Michener Art Museum, 138 South Pine St., Doylestown, to Oct. 2. Admission is $12.50; $11.50 for seniors; $9.50 for students; $6 for ages 6 to 18; under 6 admitted free. Call 215-340-9800.

A complete guide to events in the region over the coming weekend will appear in the Weekend section in Friday's Inquirer. Send notices of events for "7 Days" to Michael Harrington at mharrington@phillynews.com.