CREATE TABLE table_15906 ("Member" TEXT, "Headquarters" TEXT, "Classification" TEXT, "Chapters" FLOAT, "Founded" TEXT, "UCCFS" FLOAT)

What are the members listed with the sorority classification
SELECT "Member" FROM table_15906 WHERE "Classification" = 'Sorority'
SELECT "Member" FROM "table_15906" WHERE "Classification" = 'Sorority'