Final answer:
The three closest Sigma Pi chapters depend on the student's location and can only be determined by consulting the official Sigma Pi website or contacting their national headquarters for current chapter locations.
Step-by-step explanation:
Identifying the three closest Sigma Pi chapters to a specific location would require knowledge about current active chapters and their geographical proximity to the inquirer. Since Sigma Pi is a Greek letter fraternity with various chapters across different universities and colleges, the answer would vary based on where the student is located or referencing. Sorority recruitment, as mentioned in the context of Texas A&M, is an event where potential new members can learn about the fraternity and sorority community. However, to answer your specific question about Sigma Pi chapters, it would be essential to consult the official Sigma Pi website or contact their national headquarters for the most accurate and up-to-date information regarding chapter locations.