<p>Is it unusual for an interviewer to take you out to lunch after you’ve been admitted? Or is it part of the alumni club thing?</p>
<p>It is totally up to the interviewer. I wouldn’t think it’s strange, maybe not common practice but a nice thing to do nevertheless.</p>
<p>Nice??? If they take you out to lunch, that’s like extending the interview for another hour…</p>
<p>unusual; he/she must have enjoyed the interview with you :)</p>