also: イーエスエス
noun
English Speaking Society; English conversation club
A common extracurricular club in Japanese schools and universities, focused on English conversation and cultural exchange. Often abbreviated as ESS.
大学でESSに入って、英会話を練習しています。
I joined the ESS at university and am practicing English conversation.
ESSの活動で留学生と友達になった。
I made friends with international students through ESS activities.