Swap, listen, and learn.

BARTER
Exchange Your Ways with The Swapaholics
What: Our fave fashion recyclers honor National Swap Day with an epic interchange of clothing (men, women, and children), shoes, books, and DVDs curated by local in-the-knows.
Why: Your Yankee swap haul needs a new home.
When: Tonight, 5-10 p.m.
Where: Arts at the Armory, 191 Highland Ave., Somerville (617-718-2191). Tickets ($15) online at nationalswapday.com. Enter SWAPCANDY for $5 discount.

MAKE
Roll like a Pro Sushi Class
What: Slash your monthly takeout budget by learning the art of maki assemblage, from rice cooking to fish cutting, with a little sake courage to see you through.
Why: You have raw talent.
When: Sat., 1-3 p.m.
Where: Basho, 1338 Boylston St., The Fenway. Reservations to 617-262-1338. Cost is $30.

Skin of the Yogi: Natural Skin Care from Your Pantry
What: Kate O’Donnell delves into the ayurveda healing system to unveil nourishing beauty regimens drawn from a few well-known natural ingredients.
Why: It’s all so simple.
When: Sun., 2:30-5 p.m.
Where: Back Bay Yoga, 364 Boylston St., 2nd flr., Back Bay (617-375-9642). Register online at backbayyoga.com. Cost is $50.

WARM UP
Boston Firehouse Chili Cook-off
What: Fourteen of the city’s ladder companies vie to whip up the best bowl of con carne.
Why: All proceeds benefit The Greater Boston Food Bank.
When: Tues., 6-9 p.m.
Where: Four Seasons Hotel, 200 Boylston St., Back Bay (617-338-4400). Tickets ($95) online at gbfb.org.

Photo: Courtesy of The Swapaholics