 While in Washington , Lead <unk> encountered several other incidents of segregation that are believed to have contributed to the <unk> of the song . For instance , when Lead <unk> , <unk> , and their wives wanted to go out to dinner together , they discovered that it was impossible for the mixed race group to find a restaurant that would serve them . Lead <unk> was told that if he returned later without <unk> , he would be served . 
