Another crossover to "Parenthood". Crosby is in this episode and mentions recording a song at The Luncheonette which is the studio he and Adam Braverman own in "Parenthood". And in looking back to an episode of "Parenthood", Will Freeman was at a poker party Crosby and Adam held at the luncheonette.
The sequence of Joshie's bar mitzvah celebration was shot in an historic building in Los Angeles, California, completed in 1926 as the Elk's Temple (Lodge #99), and later repurposed as the Park Plaza Hotel, and more recently The Macarthur (a "special events venue"). The building's Wikipedia page lists more than forty movies, TV series and music videos filmed there.