Czech alternative rock group. Originally founded in 1973 as “The Naive Extempore Band” by Jaroslav Jeroným Neduha, in 1976 renamed to Rock & Jokes Extempore Band which disbanded in summer 1978. Reformed in November 1978 by Mikoláš Chadima as “The New Rock & Jokes Extempore Band”, in 1979 shortened to “The Extempore Band”, disbanded again in the early 1980s (transformed to MCH Band). Revived in early 1990 by Neduha as “JéJé Neduha & Rock & Jokes Extempore Band”. Neduha’s Rock & Jokes Extempore Band still performs as of 2010.