As a former Pike member and officer, I would definitely encourage to at least attend rush. Even if he decides not to pledge, he will meet some people.
That being said, there are some advantages to being Greek. Copied and pasted these and I am sure they will get bashed to hell.
*Nationally, 71% of all Greeks graduate, while only 50% of non-Greeks graduate.
*The All Greek GPA is higher than the overall collegiate GPA.
*Since 1910, 85% of the Supreme Court Justices have been Greek.
*85% of the Fortune 500 key executives are Greek.
*Of the nation's 50 largest corporations, 43 are headed by Greeks.
*76% of Who's Who in America are Greek.
*All but two Presidents since 1825 have been Greek.
*70% of the U.S. Presidents' cabinet members since 1900 have been Greek.
*76% of U.S. Senators are Greek.
*Both women appointed to the U.S. Supreme Court were sorority members.
*Over 85% of the student leaders on 730 campuses are members of Greek-letter organizations.
*Less then 2% of an average college students expenses go towards Greek membership dues.
*A study by the University of Missouri found that Greeks throughout the US and Canada are more involved on their campuses and rate their overall university experience better.
*The same study found that Greeks are more involved in their communities; and give more generously to their alma maters.
*Greeks form the largest network of volunteers in the U.S.-Nationally, Greeks volunteer approximately 10 million hours of community service annually.