In the 1930s, gaming grew nominally throughout the state. The first licensees that took advantage of the legalization of wide-open gaming were existing bingo parlors, card rooms and small casinos already operating games of chance. The first four licensees (Boulder Club, Las Vegas Club, Exchange Club and Northern Club) were located in Downtown Las Vegas with many to follow in Reno and outlying areas. Although Nevada casino gaming would not grow much before the end of World War II, many new operators began to flock to Nevada to set up new gaming operations, including William Fisk Harrah, founder of today's (2007) world's largest casino-resort company Harrah's Entertainment.