Question: Are both Letters to Cleo and Drowners rock bands?

Context paragraphs:
G.a.s. Drummers: G.a.s. Drummers was a melodic hardcore band formed in Jerez de la Frontera, Spain at the end of 1997 by three teenagers who stood out from their other students due to their colourful hair dies and their taste in the california punk rock bands such as Bad Religion, Operation Ivy, NOFX, Lagwagon, The Descendents etc.  Original members from other small local bands Dani Llamas (guitar and vocals), Pakomoto (Bass and vocals) and Rafa Camison (Drums) started playing together and composing their own music and after one year of sending demos around the country they got put as the opening act for Swedish Punk Rock band Randy on their Spanish tour.  A tour that took the band through the whole country helping a lot of Spanish kids discover that there were actually Spanish bands capable of sounding as good as some of their favorite American bands.  This lead immediately the band to sign to a young record label called Slide Chorus Records a young emerging record label from Madrid which would start releasing albums for other Spanish Punk Rock bands.  This first release titled Proud To Be Nothing hit the streets at the end of 1999 and was presented on their first European tour which covered Spain, Great Britain, France and the Netherlands amongst Spanish punk rock legend[P.P.M.

American Hi-Fi: American Hi-Fi is an American rock band formed in Boston in 1998.  The band consists of lead vocalist/rhythm guitarist Stacy Jones, lead guitarist Jamie Arentzen, bassist/backing vocalist Drew Parsons, and drummer Brian Nolan.  Prior to the group's formation, Stacy Jones was well known for being a drummer in the successful alternative rock bands Veruca Salt and Letters to Cleo.  American Hi-Fi has a close relationship with Miley Cyrus, whose band shares two members with American Hi-Fi.  The group has a mixed musical style that includes influences from pop punk, alternative rock, and power pop.

Drowners (album): Drowners is the debut album by the indie rock band Drowners, released on January 28, 2014.

List of punk rock bands, L–Z: This is a list of notable punk rock bands (letters L through Z).  The bands listed have played some type of punk music at some point in their career, although they may have also played other styles.  Bands who played in a style that influenced early punk rock—such as garage rock and protopunk—but never played punk rock themselves, should not be on this list.  Bands who created a new genre that was influenced by (but is not a subgenre of) punk rock—such as alternative rock, crossover thrash, grunge, metalcore, new wave, and post-punk—but never played punk rock, should not be listed either.

Letters to Cleo: Letters to Cleo are an alternative rock band from Boston, Massachusetts, best known for the 1994 single, "Here & Now", from their full-length debut album, "Aurora Gory Alice".  The band's members are Kay Hanley, Greg McKenna, Michael Eisenstein, Stacy Jones, Scott Riebling, and later, Tom Polce.

List of punk rock bands, 0–K: This is a list of notable punk rock bands (numbers 0–9 and letters A through K).  The bands listed have played some type of punk music at some point in their career, although they may have also played other styles.  Bands who played in a style that influenced early punk rock—such as garage rock and protopunk—but never played punk rock themselves, should not be on this list.  Bands who created a new genre that was influenced by (but is not a subgenre of) punk rock—such as alternative rock, crossover thrash, metalcore, new wave, and post-punk—but never played punk rock, should not be listed either.

Drowners: Drowners are an American-Welsh indie rock band formed in New York City in 2011 by Matthew Hitt (lead vocals, guitar), Jack Ridley III (lead guitar), Erik Lee Snyder (bass) and Daniel Jacobs (drums).  Their first release was the EP "Between Us Girls" which appeared in early 2013.  In January 2014 their debut album "Drowners" was released worldwide preceded by the single "Luv, Hold Me Down".  In 2016, the band released their second album "On Desire".  The band has toured both North America and Europe.

Haitian rock: Haitian rock, or rock kreyòl, started as rock n roll in Haiti in the early 1960s.  It was played by rock bands called "yeye" bands.  The name "yeye" derives from the Beatles lyrical verse, "yeah, yeah, yeah", which took off in the United States and was listened to by upper class Haitian families who had access to the radio.  Young Haitians formed small electric guitar-based bands.  These "yeye" rock bands were short-lived, as the addition of "compas" to their repertoires resulted in a sound was called mini-jazz, or "mini-djaz" in creole.

Demons (band): Demons are a punk rock/garage punk band from Sweden.  The band includes quotation marks in their name to differentiate themselves from other bands with a similar name.  Their music has been described as "punk 'n' roll", but the band claims it should only be described as high-energy rock.  Their musical style relies heavily on the energy derived from punk rock.  Influences include 1960s garage rock bands such as The Sonics, The Standells and Shadows of Knight, The Velvet Underground, The Stooges and New York Dolls; and punk rock bands such as The Damned, The Heartbreakers and The Saints; and early hardcore punk bands such as Black Flag, Bad Brains and Dead Kennedys.  "Demons" has often been compared to contemporary groups like New Bomb Turks, The Hellacopters and Electric Frankenstein.

Sister (Letters to Cleo album): Sister is a compilation album by the band Letters to Cleo.  It was released on November 3, 1998.  The album's last track is a cover of Fleetwood Mac's "Dreams".  Although it was the final Letters To Cleo album to be released through a major label, the material on the album pre-dates all their other work; tracks 1-7 are originally from their demo tape, and tracks 8-11 are rarities previously performed live, and track 11 was on a compilation honoring music of the '70s. .

Supporting paragraphs: Letters to Cleo Drowners
Answer: yes