you absolutely always stand to recognize an alumna who enters a room regardless of what the event or where it is held.
example: founder's day get together with your local alumnae chapter. collegiates stand everytime another alumnae member enters the room.
your last meeting of the year and the seniors have already gone through order, you stand and recognize the alumnae present at the beginning of the meeting, even if it's an informal meeting.
standing is a sign of respect towards alumnae members and should be a commonplace in your chapter.
shelley j
sigma k
ps - and it's pretty nice to feel so special when you are a young alumnae walking into a room of collegiates.