Complex sentence: This also was enforced in many of the work positions thus, African Americans except those who provided the labor for low-paying menial positions or entertainment and Hispanics were limited in employment occupations at the white owned clubs.
Split into simpler sentences: This also was enforced in many of the work positions. Thus, African Americans (except those who provided the labor for low-paying menial positions or entertainment) and Hispanics were limited in employment occupations at the white-owned clubs.