Those who complain that good live music in London is too expensive should check out the Social, a bar hidden away in a basement behind Oxford Circus, where a monthly country, folk and blues night known as Health and Happiness takes place. Amazingly, it is absolutely free, though the artists that appear here reflect the varied goings-on at the grass roots of the continuing folk-country revival.

This month, the lineup includes snuff-snorting, crowd-pleasing singer-songwriter Danny George Wilson and blues guitarist Luther Russell, while headliners Indigo Moss are a rockabilly-folk-country band from south London fronted by a banjo player who looks as if she has just flown in from the Appalachians, and a guitarist sporting a cap and a harmonica strapped around his neck, seeming like an unexpectedly fashionable answer to the young Bob Dylan.

It has been a good year for Indigo Moss. They have opened for The Good, the Bad and the Queen and clearly have the potential to become a highly original rock-country fusion band, though on this showing, their constantly varied instrumental work was more impressive than their vocals.

They started out with a brief banjo-plucking country hoedown before Hannah-Lou Moss joined Trevor Moss on guitar for a series of full-tilt songs that had the rousing appeal of early skiffle anthems, but were driven on by a powerful rhythm section that at times swamped the singers. Trevor Moss eventually made himself heard when he switched direction for a more reflective solo ballad, England, which showed off his harmonica work. Then he moved to mandolin for the band's singalong anthem, Nature of This Town, which was followed by a Dylanesque country-rocker and a remarkably fine and attacking treatment of the early Elvis hit, That's All Right. It was an intriguing set, despite those vocals.