Question: What country of origin does Squirrel Nut Zippers and Sponge have in common?

Context articles: Johnny Vomit &amp; The Dry Heaves
Roasted Right
Jimbo Mathus
Charleston Stroll
Squirrel nut caramel
Sponge (band)
Mammoth Records
Andrew Bird's Bowl of Fire
Tom Maxwell (singer)
Squirrel Nut Zippers

Johnny Vomit & The Dry Heaves was a high school garage band that formed in mid-1980s Corinth, Mississippi, that featured future leaders of the Oblivians and Squirrel Nut Zippers, Jack Oblivian (né Yarber) and Jim Mathus.
 Under the names Johnny Goopa (Yarber on drums) and Bart Barf (Mathus on bass), they supported Johnny Vomit on two seven-inch records issued on Eric (né Friedl) Oblivian's Goner Records.
Roasted Right is an EP by the swing revival band Squirrel Nut Zippers that was released in 1997.
 Unlike other albums by the Zippers, brass and woodwinds were replaced by guitars and the blues.
James H. Mathis, Jr. (born August 1967), known as Jimbo Mathus, is an American singer-songwriter and guitarist, best known for his work with the swing revival band Squirrel Nut Zippers.
The Charleston Stroll is a swing line dance choreographed by Sing Lim from Singapore to the song Put A Lid On It by the Squirrel Nut Zippers.
 It can be found danced in many swing scenes all over the world.
Squirrel Nut Caramels (chocolate flavored) and Squirrel Nut Zippers (vanilla flavored) are chewy caramel candy mixed with peanuts.
Sponge is an American alternative rock band from Detroit, Michigan formed in 1991 by Vinnie Dombroski, Mike Cross, Tim Cross, and Joey Mazzola.
 All were formerly of the hard rock band Loudhouse.
 Sponge was signed to Sony Records in 1994 but has since switched to other labels.
Mammoth Records was an independent record label founded in 1989 by Jay Faires in the Carrboro area of Chapel Hill, North Carolina.
 The majority of the acts on Mammoth were executive-produced by Faires and the label’s general manager, Steve Balcom.
 The label was the first independent to produce two platinum records.
 Mammoth featured an eclectic roster including: Blake Babies, Chainsaw Kittens, Machines of Loving Grace, Juliana Hatfield, Joe Henry, Seven Mary Three, Squirrel Nut Zippers, Victoria Williams, The Sidewinders, Jason & the Scorchers, Frente!
, The Bats, The Backsliders, Antenna, Dash Rip Rock, Dillon Fence, Fun-Da-Mental, Fu Manchu, Kill Creek, The Melvins, Jocelyn Montgomery, The Hope Blister, My Friend Steve, and Vanilla Trainwreck among others.
Andrew Bird's Bowl of Fire was an American band fronted by musician Andrew Bird.
 After releasing his first solo album, "Music of Hair", Bird appeared on three albums by Squirrel Nut Zippers before becoming the bandleader for Andrew Bird's Bowl of Fire.
Thomas Edward Maxwell (born September 19, 1965) is an American songwriter, musician, vocalist, and writer.
 Most notably Maxwell is the former lead singer of the swing revival band Squirrel Nut Zippers.
 He wrote the single "Hell" from the 1996 certified platinum album "Hot".
The Squirrel Nut Zippers is an American swing band formed in 1993 in Chapel Hill, North Carolina, by James "Jimbo" Mathus (vocals and guitar), Tom Maxwell (vocals and guitar), Katharine Whalen (vocals, banjo, ukulele), Chris Phillips (drums), Don Raleigh (bass guitar), and Ken Mosher.