I once was in an interview and the interviewer said "We're going to play a game." I got up and left. Fizzbuzz is a dumb and useless game and if an interviewer uses that as the benchmark for hiring then they waste the interviewee's time.
Is your time is so precious, that you'd waste however long it to you to prepare and turn up to an interview, because the interviewer wants to double check you're not one of the many applicants who struggle at a simple coding problem?