If you're concerned with the who's who, by all means take initiative and check people in that way you'll get to know everyone. The more involved you get in the club the more it helps the club, I'm speaking of bread and butter stuff setup, cleanup, check in. Ask Charles, or Bryan "what can I do to help you?", if you arrive early you'll get to know everyone quickly.
The reason I would take that approach is because some people are not comfortable speaking to a group of people they don't know.