"At a mixer, the guys have to work hard to liven things up."
- "At a mixer, the guys have to work hard to liven things up. "
"at a mixer" 「合コンは頑」"combined party" や "party" または "Gokon" も言えます。
"the guys" 「男が」"the men" や "the boys" も言えます。
"have to work hard to ~" 「頑張って〜ないとダメ」
"liven things up" 「盛り上げ」"liven up the party" や "liven up the mood."