Charlie Kohlhase’s Explorers Club, in a setting jazz fans are unlikely to see for a while. (Photo: Charlie Kohlhase via Facebook)

With nightclubs closed, some atypical live music is making its way outdoors. Alex Lemski, who programmed improv and postmodern jazz at Inman Square’s Lilypad through his Creative Music Series, is instead promoting a free “happy hour” jazz concert Friday in Assembly Square.

Charlie Kohlhase’s Explorers Club plays the 6:30 p.m. Friday jazz concert at Sylvester Baxter Riverfront Park by a walk-bike trail, with the Mystic River as backdrop. This will be the band’s first outing since Feb. 26, Kohlhase said.

“Not in the shopping center,” Lemski is careful to say of the second in “what could be a nice reset of live music we missed so much. And it’s fun checking it out by the Mystic River, along a bike and walking path surrounded by green.” The first concert was July 10.

The band is Charlie Kohlhase on tenor, alto and baritone saxophones; Daniel Rosenthal on trumpet and flugelhorn; Tony Leva on bass; and Curt Newton on drums.

The concert site is not far from across the Assembly Square parking lot, with Staples, the Christmas Tree Shops, Chase and Starbucks on the other side of the passing road, Lemski said – just turn left and curve around Grand Union Boulevard to hear. “Distancing and masks is your ‘ticket,’” he said. There’s “lots of space to listen and roam.”