The other two already have a table in the Acumen cantina when Ruby and J'zargo arrive. Beyond them, Tolfdir and the elf who Onmund and Ruby saw sitting with Thelsa last night are sharing a table with two middle-aged humans, a redhead and a brunet, and another table has yet another elf and yet another human, not talking to each other but not looking particularly hostile either.
"I guess it was too much to hope for, to not be the only Nord here," Onmund sighs once Ruby and J'zargo have joined them.