Tosefta su Hullin 8:7

[The prohibition against eating] meat with milk applies in the Land of Israel and outside the Land of Israel, inside the Temple and when not inside the Temple, with chullin (unconsecrated meat) and with kodashim (consecrated meat). [As to] one who takes a vow from meat (i.e., that meat is forbidden to him), he is forbidden from all types of meat, [except that] he is permitted in the flesh of fish and locusts. Fowl may neither be placed [on the table] nor eaten [with milk products], says Rabbi Yosei. This is among the leniencies of Beit Shammai and the strictures of Beit Hillel. Beit Shammai say, one may place [fowl on the table with milk products] but it may not be eaten [with milk products], and Beit Hillel say, it may neither be placed nor eaten. Rabbi Eliezer son of Rabbi Tzadok says, fowl may be placed [on the table] with cheese without any restriction (afikolos, cf. Hul. 104b:11, "afikoren"), [but] he says, it is not eaten [with cheese]. Others say in his name, it may even be eaten [with cheese]. In what case does this rule apply? In the case of a dining table, but in a table that is not a dining table, he may put a cut (of meat, presumably fowl) on one side, and cheese on the other side. [One may also] place them into a peddler's basket with a leveling rod ("בקפוף ובמחוק," see Jastrow) (presumably to separate the meat from the cheese) and sling them over his shoulder [and carry them in this fashion]. Behold, [the Sages] did not forbid it except on a dining table. Rabbi Shimon ben Gamaliel says, even on a dining table. Two that went to an inn, this one coming from the north and that one coming from the south, this one may eat his cut, and that one may eat his cheese, and we are not concerned [that one will share his food with the other, since they are strangers]. Behold, [the Sages] did not forbid [two guests eating at the same table in an inn, one meat and one cheese], except when all of it is handled together (see Jastrow, תְּפִיסָה).