The Rhino-like Judoon are in the crowd, some with their helmets off. You speak to one of them, the Captain it seems. "This is a friendly peace gathering held by the Galactic Federation," he tells you in his gruff voice.

Speak to the Ood Prime Minister
Debate with the Grame of Balhoon

Consult the Uvodni Governor

Chat to the Face of Boe

Meet the Sycorax

Tattle with the Zygon High Council

Confer with the Raxacoricofallapatorian delegate

Don't speak to any more aliens