While hiding as refugees in Ba seng sei, Aang, zuko, katara, sokka, ans toph spend some of their days in alot of places. this is just one of the few places sokka went
Sokka wanted to do something Fun so he went to the fight arena. “i’m going to the fighting ring today, I heard its gonna be awesome”. “I’m going with you”, said toph. “i’m getting tired of twinkletoes over here” She motioned at aang. “Hey! at least i’m getting better now!” he said back. “Whaterver”, she said and left with Sokka. Perhaps she had a reason for wanting to go. Though she was blind, she could “see” by feeling the earth’s vibrations. but the place at the arena where spectators sat was made of wood so there was no way she could even detect what was happening except by listening. So basically she had other intentions.