Temple Beth Am was a Jewish Reform congregation founded by Rabbi Mel Hecht in 1984 in Las Vegas, Nevada. In 1992, some members of the congregation, unhappy with Rabbi Hecht's leadership, broke off to form Congregation Adat Ari El. Construction on Beth Am's campus began in Summerlin in 2001. In 2007 Temple Beth Am and Adat Ari El merged to form Temple Sinai.

Temple Sinai is a Jewish Reform congregation in Las Vegas, Nevada. It was founded in 2007 when Temple Beth Am and Congregation Adat Ari El merged. Temple Sinai has over 300 member families and its sub-groups include a Sisterhood, Men’s Club, Chavurah, Youth Group, and committees. Kenneth Segel was the first rabbi of Temple Sinai and was succeeded by Rabbi Malcolm Cohen in 2009.

Susan Rhodes was a member of Temple Beth Am in 2006-2007 when the congregation merged with Adat Ariel to form Temple Sinai. During 2006 Rhodes served as Sergeant-at-arms during Temple Beth AM at meetings that were held to discuss the financial issues faced by Temple Beth Am and as secretary during the 2007 merger.

Congregation Adat Ari El was a Jewish Reform congregation in Las Vegas, Nevada founded by former members of Temple Beth Am in 1992. The congregation started out with about 15 families that held services in a donated storefront every two weeks, led by a rabbi who traveled from California. In 2007, Adat Ariel merged with Temple Beth Am to form Temple Sinai.