Nothing says St. Patrick’s Day like tacos. But then every day is a taco holiday in L.A. Trejo’s Tacos and Cantina is celebrating with corned beef and fried avocado tacos. If you’re not into being green, Smorgasburg hosts its second annual Beat Swap Meet for vinyl lovers on Sunday and chef Neal Fraser is raising funds in the garden at Redbird/Vibiana for L.A.’s BEST Afterschool Enrichment Program. Here’s what’s popping up this week.