On the count of tres …

RACE
One Love Stache Dash
What: Wear a mustache, sombrero, and charro suit for the inaugural 5K fun run (plus DJ preparty and postrace fiesta) benefiting One Love Generation.
Why: Receive a $25 Tin Lizzy’s gift card with your $25 registration fee (that’s loco).
When: Sat. Preparty/registration, 7:30 a.m.; race, 9 a.m.
Where: Tin Lizzy’s Cantina, 3639 Piedmont Rd., Buckhead (404-846-6000). Registration (recommended) online at onelovestachedash.com.

ADMIRE
HGTV Green Home at Serenbe
What: Spend a day in the country and tour the breathtaking (and sustainable) modern-day farmhouse before someone wins it.
Why: Feel good even if you don’t; proceeds benefit the Serenbe Institute and the Chattahoochee Hills Charter School.
When: Thru June 24. Tues.-Sun., 11 a.m.-7 p.m.
Where: 10691 Serenbe Ln., Chattahoochee Hills (770-463-2610). Tour tickets ($20) online at brownpapertickets.com or at the door.

EAT
Maki Fresh Spring Menu
What: For quick and casual that’s healthy and high quality, try new eats like lean bean salad (asparagus, green beans, sprouts, edamame, and ginger dressing), Kadoma tuna (rice cake, spicy tuna, avocado, and jalapeno), and ahi tuna banh mi.
Why: The chocolate chip cookie/brownie with green tea icing is worth the calories.
When: Daily, 11 a.m.-9 p.m.
Where: 2349 Peachtree Rd., Buckhead (404-869-6600).

PARTY
Derby on the Square
What: Cheer on your favorite horse or get distracted by the open bar, heavy hors d’oeuvres, and bluegrass music at the inaugural event.
Why: Break out your finest headpiece (sombreros welcome) for the hat contest or show off your skills on the cornhole court.
When: Sat., 4-9 p.m.; open bar, 4-7 p.m.
Where: 5 Seasons Westside, 1000 Marietta St. NW, Westside (404-875-3232). Tickets ($35) online at derbyonthesquare.stagehq.com.

STRUT
Pet Cotillion
What: The P.A.L.S. Atlanta charity event gives you an excuse to dress up Fluffy (as if you needed one).
Why: Free cocktails and appetizers for you, Lick a Lots and plenty of doting for your costumed canine.
When: Sun., 3-6 p.m.
Where: Piedmont Bark, 501 Amsterdam Ave. NE, Midtown (404-873-5400). Tickets ($20) online at 2012petcotillion.eventbrite.com.

Photo: Christy Bosher / Courtesy of One Love Generation