Indie-folk act David Wax Museum will return to the Linda tomorrow (Friday) along with semi-local chamber-pop band Cuddle Magic (8 PM, $18, 465-5233). . . . Crystal Bowersox is a dreadlocked country-singing American Idol finalist. What? She’ll be at Club Helsinki on Friday with Emily Elbert (9 PM, $30, 828-4800). . . . Chicagoland psych trio Viper Fever will be at Red Square on Friday (8 PM, 465-0444). . . . British folk singer Laura Marling comes to Bearsville Theater on Friday with Elijah and the Moon (9 PM, $35, 845-679-4406). . . . The Meter Men will headline this year’s Catskill Chill festival along with Lotus, Galactic, Conspirator and a bunch more at Camp Minglewood in Hancock Friday-Sunday ($175, catskillchill.com). . . . Banjo strummer Kendl Winter will play the Half Moon on Saturday with Lowest Pair and Penn Sultan (8 PM, thehalfmoonhudson.com). . . . Schenectady native Steve Katz comes to the Linda on Saturday (8 PM, $18, 465-5233). . . . Sarah Lee Guthrie and Johnny Irion make two area stops this weekend, at Club Helsinki on Saturday and Caffe Lena on Sunday (9 PM, $18, 828-4800; 7 PM, $18, 583-0022). . . . Jewish reggae-rapper Matsiyahu returns to Upstate Concert Hall on Monday (8 PM, $23, 371-0012).