I Refuse to Attend "Optional" Work Happy Hours

My team has "optional" happy hours every other Friday. I've skipped the last six. My manager, Laura, pulled me aside and said my absence is "noted" and that "face time matters for team culture." I said if it's optional, it's optional. She said "technically yes, but perception matters." I work remote 3 days a week and go to all required meetings. I'm productive and hit my goals. I don't drink and I'd rather spend Friday evenings with my family. Laura says she's not forcing me but "encouraging" me to show up "once in a while." A coworker told me Laura mentioned my non-attendance in a team meeting. I feel like "optional" is doing a lot of heavy lifting here. I shouldn't have to give up my evenings to be seen as a team player.