Jam nights, anywhere.

Sweaty rock-and-blues jam in Melbourne's iconic AC/DC Lane.

Sydney's longest-running jazz/funk jam.

Toronto's most consistent jazz jam, weekend afternoons.

Centuries-old vaulted cellar venue, swing-jazz jam.

Mitte's heart of the Berlin jazz scene. Open jam Wednesdays.

Weekly Tuesday jazz/funk/soul jam run by the Bristol University Jazz Funk Soul Society at Mr Wolfs in the Old City. Free before 10pm; jam followed by a band slot from 11pm on alternating weeks.

Weekly Sunday jazz session at this Old Market pub. The Adam Stokes Trio plays a set with a different guest from 5pm, then opens up an instrumentalist jam from around 6:30pm.

Weekly open-stage jazz jam at the Jazz Bar, where the resident house trio backs sit-in players. Sign up on arrival. The Jazz Bar has been running on Chambers Street since 2005.

Long-running Monday-night blues jam at London's dedicated blues bar in Soho, off Carnaby Street. Bring an instrument and join the list. A second jam runs Sunday afternoons.

Weekly Sunday afternoon jazz jam in the basement of the Spice of Life pub in Soho, hosted by Different Planet. Open to instrumentalists and singers; food served all day.

Late-night Monday jam at the legendary Soho jazz club, running for decades. A different ensemble of British jazz players hosts each week, focused on bebop and hardbop standards. Tickets typically £10.

After the main show, the bandstand opens up. Iconic London late-night jam.

Long-running Sunday jazz jam in the heart of Soho. Sign up early, bring your axe, expect heavy hitters.

Weekly Sunday session at Dalston's long-running Vortex Jazz Club, hosted in rotation by Jas Kayser, Rick Simpson, Nick Costley-White, Sean Gibbs, Helena Kay and Riley Stone-Lonergan.

Long-running Monday jazz jam at Manchester's main jazz club in the Northern Quarter. The format rotates between a standards jam, a New Orleans brass-led jam and an all-star funk/soul jam.

Late-night NYC jazz jam in a tiny basement room. Cash door, world-class players.