WHAT Arena Players' Shakespeare-in-the-Park season opens this weekend with tragedy -- "Romeo & Juliet" -- and closes in August with comedy -- "Much Ado About Nothing." Performances are in the dramatic outdoor setting of the Vanderbilt mansion courtyard. Seating is available, but you may want to bring cushions or your own chair. If you arrive early, you can picnic on the Vanderbilt grounds overlooking Northport Harbor.

WHEN | WHERE 8 p.m. Wednesdays and Fridays, 7 p.m. Sundays through July 31 ("Romeo") at Vanderbilt Museum, 180 Little Neck Rd., Centerport (Aug. 5-28 for "Much Ado")

INFO $15; arenaplayers.org, 516-293-0674

WHAT "Betty's Summer Vacation," a social farce by the master of the genre, Christopher Durang, mines the comic minefield of sharing a beach house at what may as well be the Hamptons. But with this collection of mismatched obsessive compulsives (Veanne Cox stars as one), it might instead be one of Dante's circles of hell. You know, the funny one.

WHEN | WHERE Previews Tuesday through Friday nights at 8, official opening next Saturday night, through July 31 at Bay Street Theatre, Sag Harbor

INFO $55-$65, baystreet.org; 631-725-9500 -- steve parks

Music: Opera and pops

WHAT Opera Night in Northport observes its seventh anniversary with a concert of favorite arias performed by sopranos Barbara Divis, Lauren Haber, Cheryl Savitt Spielman and Kimberly Iannuzzi, tenors Maurizio Casa, Bruce Solomon, Young Ha Kim and mezzo- soprano Jeanny Schwartz, plus some student voices. Classical pianist Isabella Johnson accompanies.

WHEN | WHERE Friday night at 7:30 at St. Paul's United Methodist Church, 270 Main St., Northport

INFO $10 suggested donation; 631-261-8808

WHAT The Morgan Park Summer Music Festival opens its 52nd season in Glen Cove with a free Independence Day weekend "Salute to Americana." Eric Albinder conducts the North Shore Pops Concert Band. From your seat on the lawn, you can glimpse the harbor and the Long Island Sound beyond. Bring a beach chair or blanket and a picnic supper. Sorry, no alcohol permitted.

WHEN | WHERE 7:30 p.m. Saturday at Morgan Memorial Park, Germaine Street, between Landing Road and McLoughlin Street, Glen Cove (rain location: St. Patrick's Parish Hall, Pearsall Avenue)

INFO Free; morganparkmusic.org, 516-671-0017

Art: Juried winners

WHAT The Art League of Long Island shows off the winners and other entries in its 55th annual Long Island Artists juried competition. Painter and art historian Thomas Germano of Farmingdale State College made his selections from 284 entries in myriad fine art media. The three winners of the award of excellence are William A. Dodge of Plainedge for his "Needed Painting" oil on canvas, Doug Reina of Stony Brook for "Minidog," an oil rendered on a metal butcher's tray, and Diana DeSantis of Whitestone for her "Contemplation" pastel. Earning honorable mentions are Shain Baird of Huntington, Kathy Burns of South Hempstead, Celeste Mauro of Northport, Frank Sposato of Lloyd Harbor and Nancy Wernersbach of Lynbrook.

WHEN | WHERE 9 a.m. to 4 p.m. weekdays, 11 a.m. to 4 p.m. weekends through July 17 at the Art League of Long Island's Jeanie Tengelsen Gallery, 107 E. Deer Park Rd., Dix Hills

INFO Free; artleagueli.org, 631-462-5400