cenacle
noun
cen·a·cle ˈse-ni-kəl 
: a retreat house
especially : one for Roman Catholic women directed by nuns of the Society of Our Lady of the Cenacle
Example Sentences
Recent Examples on the Web Joseph belonged to the Two Hearts as One and Prayer House of All Graces Ministry in Southington, Connecticut and has traveled to many states praying the Most Holy Rosary and other Catholic prayers at religious prayer cenacles. 
courant.com, 16 Aug. 2019
courant.com, 16 Aug. 2019 Word History
Etymology
Late Latin cenaculum the room where Christ and his disciples had the Last Supper, from Latin, top story, probably from cena dinner
First Known Use
1855, in the meaning defined above