NEW YORK — The Atlantic Theater Company returned to its roots at its 20th-anni gala May 2, honoring founders William H. Macy and David Mamet at the Rainbow Room.

Mamet roasted Macy’s goyishness and youthful exploits — “He filled more cavities than a dental college” — while Macy answered by singing a fake Yiddish folk tune.

Event was co-hosted by Atlantic member Felicity Huffman –“Flicka,” as her cohorts kept calling her — who said she only dated Macy because “amongst the available men at the Atlantic, he was the only one with a foreskin.”

Mamet’s wife, Rebecca Pidgeon, and David Pittu performed a song version of Mamet’s play “Oleanna” to the tune of “16 Going On 17.”

At the end, everyone sang the faux-collegiate “Atlantic Anthem,” which includes ironic Mamet-written lyrics such as, “We can’t pay our electric bill.”