This study investigated possible differences in family background characteristics of 140 undergraduate students, half of whom were fraternity or sorority members, at a state university in the southeastern United States. Students were asked to complete checklists which asked if they were members of Greek-letter fraternities or sororities. Three other variables were tested: parents' income, father's educational level, and parental membership in elite social clubs. Analysis of the data indicated that students who were enrolled in Greek-letter organizations were more likely to have parents who were members of elite social organizations, parents with higher incomes, and fathers with higher levels of education. The study also found that Greek-letter students tended to have higher levels of social involvement on campus. Three tables summarize data on the three variables tested. (Contains 11 references.) (CH)