ɪn nˈaɪntiːnhˈʌndɹɪd sˈɪksti sˈɪks, ðə bˈænd fɹˈiːkwəntᵻd blˈuːz klˈʌbz ɪn ʃᵻkˈɑːɡoʊ, wˌɛɹ ðeɪ sˈɔː blˈuːz mjuːzˈɪʃənz ɪŋklˈuːdɪŋ lˈɪɾəl wˈɔltɚ, mˈædʒɪk sˈæm, bˈɪɡ wˈɔltɚ hˈɔːɹtən, ænd mˈɛni ˈʌðɚz pɚfˈɔːɹm.
In 1966, the band frequented blues clubs in Chicago, where they saw blues musicians including Little Walter, Magic Sam, Big Walter Horton, and many others perform.