Shop out loud.

SQUEAL
Fashion’s Night Out
What: The evening we’ve all been waiting for. Thousands of boutiques and salons proffer free products, beauty treatments, tarot card readings, drinks, and hors d’oeuvres, fueling all sorts of style shenanigans.
Why: Newbury Street shuts down to car traffic for the first time in fifteen years, so you can venue-hop unobstructed.
When: Tonight, 6-11 p.m.
Where: Locations online at fnoboston.com.

EAT
Catalyst Opens
What: Chef William Kovel (Aujourd’hui) reveals his long-awaited solo endeavor, an 80-seat hermitage with a fireplace, a large bar area (with free Wi-Fi), and a French-tinged menu featuring spice-crusted hiramasa, honey-glazed duck breast, and homemade corn ravioli.
Why: Decompress post-work on the trellised patio with an eponymous house cocktail (Diplomatico rum, Averna, Pernod, and house bitters).
When: Opens Sat., 8 p.m. Mon. & Tues., 4:30-10 p.m.; Wed.-Fri., 4:30-11 p.m.; Sat., 5-11 p.m.; Sun., 5-10 p.m.
Where: 300 Technology Square, Kendall Square (617-576-3000).

BUY
“I’m with Vermont” T-Shirt
What: Support our northern neighbors by purchasing the special-edition slipover produced by a seventh-generation Green Mountain State family.
Why: All net proceeds go to Red Cross hurricane relief efforts.
When: Now.
Where: Online at indepedentvermontclothing.com, $25.

CUT A RUG
Dancing Under the Stars at Seaport
What: Kick it Swayze-style at a weekly outdoor soiree featuring both Latin and traditional ballroom music (single swingers welcome).
Why: On-site lessons from Ballroom Dance New England for the two-left-feet crowd.
When: Fridays thru September, 7-10 p.m.
Where: Seaport Boston Hotel and World Trade Center, 1 Seaport Ln. Tickets ($25 includes parking) online at brownpapertickets.com.

CELEBRATE
Ritz-Carlton Boston Common’s Tenth Anniversary
What: Toast a decade of opulence with the Avery Ten, a limited menu of classic martinis (Gibson, dirty, dry, and seven others) for $10 apiece.
Why: Offset the indulgence with Saturday’s free hip-hop/yoga event (part of Salutation Nation 2011) on Boston Common.
When: Thru Sept. 30. Sun.-Thurs., 5 p.m.-midnight; Fri. & Sat., 5 p.m.-1 a.m.
Where: Avery Bar, 10 Avery St., Downtown Crossing (617-574-7100).

Photo: Dario Cantatore / Getty Images