Long Island Philharmonic's two freebies

WHAT The Long Island Philharmonic concludes its summer series of free concerts outdoors on back-to-back nights. The program features maestro David Stewart Wiley's "Concentric Circles," plus a nod to the Olympics (the theme from "Chariots of Fire") and an "A" list of "B" composers: Beethoven, Brahms, Bizet and Berlioz. Friday's Eisenhower Park concert is the orchestra's only Nassau County performance this summer.

WHEN | WHERE 7:30 Friday night, Harry Chapin Lakeside Theatre, Eisenhower Park, East Meadow; 8:30 Saturday night, Chapin Rainbow Stage, Heckscher Park, Prime Avenue and Main Street, Huntington

ADMISSION Free; liphilharmonic.com, 631-293-2222

DANCE: Savion Glover

WHAT Savion Glover displays his tap genius in "Broadway Celebrates Variations," a show benefiting Huntington's Variations, A Dancer's Studio. Joining the Tony-winning Glover ("Bring in 'Da Noise, Bring in 'Da Funk") are Brandon Rebendall of "Spider-Man: Turn Off the Dark" and David Lerner of "Mary Poppins," among others.

WHEN | WHERE 7 p.m. Monday, the Paramount, 370 New York Ave., Huntington

TICKETS $75-$200 (including cocktail reception); variationsdancestudio.com, 631-425-9220 -- steve parks

PLUS: Celtic Fire comes to Patchogue

WHAT Michael Londra, whose tenor voice soared above the stomping feet of Riverdance on Broadway, brings his new company, Celtic Fire, to Patchogue for its Long Island debut. A Gateway Playhouse presentation, this interactive performance -- yes, you may be asked to show off your footwork -- fuses music, dance and storytelling in the Irish tradition. We dare you to remain dry-eyed through "Danny Boy."

WHEN | WHERE Friday and Saturday nights at 8, 71 E. Main St., Patchogue

TICKETS $59; gatewayplayhouse.org, 631-286-1133

THEATER: Bay Street's 'Big Maybelle' world premiere

WHAT For its summer finale, Bay Street presents a world-premiere musical, "Big Maybelle: Soul of the Blues," starring Tony winner Lillias White ("The Life") in the title role of the late blues legend Maybelle Smith.

WHEN | WHERE Friday, Saturday, Tuesday and Thursday at 8 p.m., Sunday at 7 p.m., Wednesday at 2 and 8 p.m., Bay Street Theatre, Long Wharf, Sag Harbor, through Sept. 2

TICKETS $66-$76; baystreet.org, 631-725-9500

PLUS: 'Fools,' an obscure Neil Simon

Bare Bones Theater Company presents a rarely performed Neil Simon comedy, "Fools," based on Russian folk tales. The show closed after 41 Broadway performances because, according to rumor, Simon didn't want his ex-wife to profit in the divorce settlement. "Fools" runs Thursday through Saturday nights at 8, Sunday at 7 p.m. through Aug. 18, 57 Main St., Northport; $20, brownpapertickets.com, 800-838-3006

'Treasure Island' debut to open Theatre Three season

Theatre Three opens its fall season with the world premiere of "Treasure Island: A Musical Adventure," with music and lyrics by Gary William Friedman and Will Holt, who previously collaborated on the Tony-nominated "The Me Nobody Knows." Starring Steve McCoy as Long John Silver, "Treasure Island" opens Sept. 15 at 412 Main St., Port Jefferson; theatrethree.com, 631-928-9100.