Polka northern Mexico and Texas, and are also called "Norteño". Traditional dances from this region reflect the influence of polka-dancing European immigrants. In the 1980s and 1990s, several American bands began to combine polka with various rock styles (sometimes referred to as "punk polka"), "alternative polka", or "San Francisco-style". There also exist Curaçaoan polkas, Peruvian polkas (becoming very popular in Lima). In the pampas of Argentina, the "polca" has a very fast beat with a time signature. Instruments used are: acoustic guitar (usually six strings, but sometimes seven strings), electric or acoustic bass (sometimes fretless), accordion (sometimes piano accordion, sometimes button
Polka in tempo and is more measured in its gaiety. Johann Strauss II's Annen Polka op. 114, Demolirer polka op. 269, the Im Krapfenwald'l op. 336 and the Bitte schön! polka op. 372 are examples of this type of polka. The polka-mazurka is also another variation of the polka, being in the tempo of a mazurka but danced in a similar manner as the polka. The final category of the polka form around that time is the "polka schnell", which is a fast polka or "galop". Eduard Strauss is better known for this last category, as he penned the 'Bahn Frei'