7Days: Regional arts and entertainment, by Michael Harrington

Sunday

What it is The exhibition Imaginary Reality, featuring large-format print images created using video, 3D gaming technology by Tim Porlock, video installations by Jennie Thwing, and digital works by Nic Coviello, is at the Main Line Art Center, 746 Panmure Rd., Haverford, to April 30. Admission is free. Call 610-525-0272.

Star-cross'd lovers The Bard's immortal tragedy of young love, Romeo and Juliet, is presented by the estimable Philadelphia Shakespeare Theatre at 2 p.m. Sunday at the company's theater, 2111 Sansom St., and continues on a Wednesday-through-Saturday schedule to May 18. Tickets are $10 to $35. Call 215-496-8001.

Monday

What are they up to? From the grassy knoll to the Illuminati to black helicopters to water fluoridation, it seems that to some folks, all of history is just the product of one big cabal. Legal scholar and former White House official Cass R. Sunstein looks at the prevalence of fervent belief in just about anything in his new book, Conspiracy Theories and Other Dangerous Ideas, which he will discuss at 6:30 p.m. at the National Constitution Center, 525 Arch St. Admission is free. Call 215-409-6700.

Tuesday

That girl She may be renowned as an activist for human rights, but to us, Marlo Thomas will always be Ann Marie, the aspiring actress from her classic 1960s sitcom. She discusses her new book, It Ain't Over . . . Till It's Over, a collection of empowering stories about women, at 7:30 p.m. at the Free Library, 1901 Vine St. Tickets are $15; $7 for students. Call 215-567-4341.

Wednesday

Chamber music The acclaimed Juilliard Quartet plays works by Beethoven, Jesse Jones, and Schubert at 8 p.m. at the Kimmel Center's Perelman Theater, Broad and Spruce Streets. Tickets are $24. Call 215-569-8080.

Traveling man At the end of the 19th century, Doylestown native William Edgar Geil was one of the best-known adventurers in the world, having journeyed along the entire length of the Great Wall of China, lived with Pygmies in central Africa, and visited cannibals in New Guinea. He made his fortune writing about his exploits and delivering lectures around the globe that he illustrated with lantern slides. Karl Stieg's 2013 documentary Geil of Doylestown: Forgotten Explorer seeks to recall him. The film screens at 7:30 p.m. at the County Theater, 20 E. State St., Doylestown. Tickets are $10. Call 215-345-6789.

Thursday

Good folk How can you resist an act with the moniker Pesky J. Nixon (let alone opening act the Lords of Liechtenstein)? We sure can't. They play at 7:30 p.m. at the Lansdowne Folk Club, Twentieth Century Club, 84 S. Lansdowne Ave., Lansdowne. Tickets are $15 to $18. Call 484-466-6213.

Off the rails In Deb Margolin's comedy 8 Stops, a woman is beset by such crushing compassion that she finds herself raising a child on a subway train with the titular tight schedule. The playwright and actress performs her work at the Kimmel Center's SEI Innovation Studio, Broad and Spruce Streets, at 8 p.m. Thursday through Saturday and 2 p.m. next Sunday. Tickets are $10. Call 215-893-1999.

Friday & Saturday

Classical clubland Violinist Kristin Lee has played with the Philadelphia Orchestra and the Roots, among others, so it makes sense she'd want to cross the boundary from concert hall to rock club. She plays a recital of works by Andy Akiho, Patrick Castillo, Jakub Ciupinski, Vivian Fung, and Shobana Raghavan, with guests Bridget Kibbey, harp, Ian Rosenbaum, steelpan, and Jason Vieaux, guitar, at the World Cafe Live, 3025 Walnut St., at 7:30 p.m. Friday. Tickets are $16. Call 215-222-1400.

Baroque spectacle An English masque from 1592, The Fairy Queen is an adaptation of Shakespeare's wedding comedy A Midsummer Night's Dream with music by composer Henry Purcell. The work is staged at Rutgers-Camden's Gordon Theater, 314 Linden St., Camden, at 7:30 p.m. Friday and Saturday, and 2 p.m. next Sunday. Tickets are $12; $10 for seniors; $7 for students. Call 856-225-6176.

Beehive queen The former lead vocalist of the Saturday Night Live band, Christine Ohlman, brings her distinctive look and good-rocking roots to the Tin Angel, 20 S. Second St., at 7:30 p.m. Saturday. Tickets are $15. Call 215-928-0978.