I see references in the decision of the Court of Appeals for the Second Circuit in the case of US v. Zingaro, 858 %. 2d 94. (1982)
The part of the massive indictment1 that alleged Zingaro's particular violations specified four categories of predicate racketeering acts: (1) extortionate extension of credit, 18 U.S.C. Sec. 892 (1982); (2) extortionate collection of credit, 18 U.S.C. Sec. 894 (1982); (3) operation of a sports betting business illegal under New York law, 18 U.S.C. Sec. 1955 (1982); and (4) operation of a card game and "Zigonett" game business illegal under New York law, 18 U.S.C. Sec. 1955. . . . The indictment detailed Zingaro's alleged involvement in Yonkers "social clubs," which offered card games and a "Zigonett" game to players, as well as extortionate loans to cover the players' gambling losses, as the basis both for the predicate racketeering acts and the collection of unlawful debt.
That agrees with zashibis's quote in distinguishing zigonett from card games, which to my mind rules out baccarat.