Medford musicians Matt and Shannon Heaton host this month’s Virtual Guided Session, the Fourth Anniversary VGS Edition, one week later than on the usual third Saturday due to the St. Patrick’s Day holiday weekend. Tune learners, second instrument players, or anyone who enjoys traditional Irish music are welcome for mid-tempo Irish tunes — jigs, reels and more — upbeat chat, and connection with other trad music lovers. Resources/tunes lists can be found on Shannon’s website. Join the global community in the live session via YouTube. Cost is free, but virtual tip jars are available via PayPal or through Venmo at ShannonHeatonMusic.