Related for Bava Batra 186:12

What is the order of a meal? Guests come in and sit down on top of benches and on top of soft seats until all [guests] come in. [After] all [guests] came in, and they (i.e. the servants) have given them [water to wash] hands, every one of them washes one hand. [When] they (i.e. the servants) poured them a cup [of wine], each one [of the guests] makes a Beracha (blessing) [for the wine] himself. [When] they (i.e. the servants) brought them appetizers each one [of the guests] makes a Beracha [for the appetizers] himself. [After the guests] have gotten up [from their temporary seats, moved to the main eating hall] and reclined [on sofas], they [i.e. the servants] gave them [water to wash their] hands [again]. Even though he already washed one hand, [still] he [has to] wash both of his hands [again]. [After] they (i.e. the servants) poured them a cup [of wine again], even though he already made a Beracha on the first [cup of wine], he makes [another] Beracha on the second [cup of wine]. [After] they (i.e. the servants) brought in front of them [more] appetizers, even though he [already] made a Beracha on the first [set of appetizers], he makes a [new] Beracha on the second [set of appetizers], but [this time] one [person] makes a Beracha for all of them. [A person] who comes [late] after three appetizers [have been served] does not have permission to enter [the dining hall]. Rebbi Shimon Ben Gamliel says, “There was a great custom in Yerushalayim (Jerusalem). They (i.e. house owners) would hang a towel above the door. While the towel is hanging guests can come in. [After] the towel has been removed guests are not permitted to come in [anymore]. And there was another custom in Yerushalayim. They (i.e. house owners) would give over [the responsibility for] a meal to a butcher (i.e. a caterer). If something went wrong during the meal they would punish the butcher [monetarily]. Everything according to the honor of the owner (i.e. the host) and everything according to the honor of the guests.”