Resent Line Up

Sophia & the Tight Groove


Sophia Tzoka, Vocals

Sophia Tzoka, of Greek origin, grew up in the USA, in the state of New Jersey, in a family with a long musical tradition.
Even as a little girl, she had the desire to become a singer. Inspired and influenced by Ella Fitzgerald's epochal live album "Sunshine Of Your Love", she turned to jazz and blues music.
Her vocal potential was soon discovered in the bars and clubs of New Jersey and she decided to pursue professional singing training.


After various studio projects and guest appearances in various bands, the singer, who now lives in Switzerland, met the musicians of “The Tight Groove”, who after the death of their frontman “Mr. Blue” were looking for a new voice.


René Hemmig, Guitar

Very early contact with music. Trumpet and piano lessons at the age of 7.
At the age of 14 he discovered his love for the guitar. Later training on classical and jazz guitar with Peter Brugger and Ueli Gasser. Lessons with Heinz Affolter at the Lucerne Jazz School.


Countless music productions with Mr.Blue Rivers and concerts with various rock, jazz, soul and blues formations. A permanent member of Mr.Blue & the Tight Groove since the early 90s.

Jam’s with the Mike Wheeler Band, among others; JJ Milteau; Joe Louis Walker and Marquise Knoxs are unforgettable.


In addition to Sophia & the Tight Groove, he also moves beyond the blues and enjoys playing the varied styles of a Hene Wirz Band or setting bluesy impulses with the unmistakable sound of the Steppin Stompers Dixieland Band.


Guitarist with “Sophia & The Tight Groove” since 2022.


François Kaech, Keyboard

Classical piano lessons
Discovery and intensive engagement with the blues piano.
Development of individual style variants.
In the 70s he toured with Big J. Caleb ("Golden Gate Quartet") and various blues groups.
A key member of “Mr.Blue & the Tight Groove” since the early 90s
Keyboardist with “Sophia & The Tight Groove” since 2022


Jürg Frei, Bass Guitar

Classical piano lessons
First band activities as a bass player at the age of 15
Co-founder of “The Blues & Boogie Company”
Gained experience as a musician in London
Since then, electric bass player in the blues scene in Switzerland and temporarily in the USA
Co-founder and permanent member of “Mr. Blue & The Tight Groove
Bassist of “Sophia & The Tight Groove” since 2022


Claudio Provenzano, Drums

Drummer and percussionist born in Switzerland with Italian roots.
Played concert tours in the 80s and 90s with Zucchero, Eros Ramazotti, Umberto Tozzi, Toto Cotugno and many other greats of the Italian pop and rock scene.
Today, among others, studio projects and concerts with “Ladyva”, Neil Taylor and Gary Nutfall (Robbie Williams), Henning Wehland (Söhne Mannheims), Justina Lee Brown etc., various jams (including Climax Chicago)
Drummer of “Sophia & The Tight Groove” since 2022


Beat Riggenbach, Tenor Sax & Bluesharp

Studied Jazz School Basel and Jazz & Rock School in Freiburg im Breisgau
Concerts with Anselm König, Groovepack, Dale Powers, Bo Katzman & Roy Ellis, among others
CD releases: with Anselm König, Bo Katzman, among others.
Acts as a very sought-after sax player in the Swiss blues, soul and jazz scene.
In addition to “Groove Pack”, long-time member of “Mr.Blue & the Tight Groove”
Joined the newly formed band “Sophia & the Tight Groove” in 2022.