Joseph – Friday night averages between 90 minutes to 2 hours. Daytime averages slightly less as we have one less course.
RG: there is a story in one of R’ Paysach Krohn’s books about two talmidei chachmim, one who sang more with his children while the second sang less with more divrei torah. the children of the first talmid chacham stayed close to their roots while the other one’s chidren strayed and they asked him why the first was more successful in raising his children and the second responded because he sang more with his children.