According to their website though it looks like they will be closed on 8.24.2019. russanddaughters.com/jewishmuseum/reservations Normally, you need to make an advance reservation for Saturdays (and, I think, prepay).
Hello Irina, Unfortunately, Russ and Daughters will be closed on August 24th for a private event. However, as Ruth said, we normally do have a pre-paid Shabbat brunch on Saturdays, and reservations can be made: russanddaughters.com/jewishmuseum/reservations. We hope you enjoy your visit! Lyndsey Anderson Director of Visitor Experience The Jewish Museum
Cafe is opened if you make a reservation and prepaid it it. It's a set brunch menu, you need to pre-order drinks as well.
Sat is free. The cafe is not opened on Sat. Sat is the Sabbath and money is not exchanged.
The restrant is Kosher and therefore closed on Saturday
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