The All Things Go Fall Classic has a lot more things going for it this time around. The single-stage music festival is jumping from one day to three for its fourth year, with more than 20 bands performing over the course of this weekend. “We get to add some artists and genres that we haven’t really been able to [feature] in past years,” says Zack Friendly, co-founder of All Things Go, which started as a D.C. music blog before growing into one of the city’s biggest festivals. And while the headliners (Galantis, Young Thug, Foster the People) grab all the, well, headlines, he’s quick to point out that the opening acts aren’t just filling the time. “Our focus has [long] been on emerging artists and new talent you may not have heard of before,” Friendly says. “We hope they play the festival this year, play 9:30 Club next year and then, two or three years from now, they’re headlining the festival.” Here are three acts to show up early for.

Union Market, 1309 Fifth St. NE; Fri.-Sun., $74 per day, $169 for three-day pass.

Friday: Win and Woo

Nick Winholt and Austin Woo, aka Win and Woo, are a remixing duo who radiate serious Chainsmokers vibes, and their tune “Chicago,” featuring soulful pop singer Bryce Fox, landed on Starbucks’ Coffeehouse Pop playlist in June. Their pop-inspired electronic tracks are head-bopping, dancey and tropical — just what you want from a band responsible for opening an entire music festival. “We were kind of blown away that we were able to get them for that spot,” Friendly says. “They’re capable of playing close to a headliner spot at many other festivals, especially electronic ones.”
Set time: 4:15 p.m.
Key lyric: “There’s not enough wind in Chicago/ to blow this over.”

Saturday: April + Vista

Here’s the easy part: April + Vista consists of April George, a vocalist and classically trained pianist and violinist, and Matthew Thompson, a producer and engineer. The duo’s sound is more complicated but, basically, it’s a fusion of soul, electronica and R&B. (To get a sense of George’s vocal powers, check out all 97 soothing seconds of “Touch.”) “It’s not just about how many tickets an artist can sell — it’s also about what kind of energy and environment are they going to bring to the festival,” Friendly says. “And April + Vista is one of those bands that, if people show up early enough, they’re gonna walk away with a new favorite band.”
Set time: 12:30 p.m.
Key lyric: “In the somber shadows like beasts we roam/ searching through the spectral catacombs.”

Sunday: Great Good Fine Ok

True to their name, the high-energy Brooklyn synth-pop duo are doing pretty well these days. Singer-songwriter Jon Sandler and keyboardist Luke Moellman released their EP “III” in January and have collaborated with acts like The Chainsmokers and St. Lucia. “III” features seven infectious songs that all have to do with love, the emotion best expressed by Sandler’s trademark falsetto. “Their live show has so much energy,” Friendly says. “They’re not a brand-new band, but we use them as an opportunity to show the D.C. general music public that there’s plenty of good talent that isn’t just going on at the end of the night.”
Set time: 1:45 p.m.
Key lyric: “Always is a word that I never say/ But I feel like trying.”