Alcohol use was assessed in a random sample of middle aged Jewish parents (1043 men and 591 women) who were interviewed at Visit 2 of the Lipid Research Clinics Prevalence Study in Jerusalem in 1976-80. A standard questionnaire probed drinking frequency (times per week) and quantity (number of drinks per week). Only 15.7% of men and 3.8% of women drank more than twice weekly, the mean number of drinks being 3.5 and 1.3 for men and women respectively. Teetotalism was rare and most subjects (61.9% of men and 55.1% of women) drank once or twice weekly, reflecting the high proportion of the Jews who use wine for sacramental purposes. Immigrants from North Africa drank more than native born Israelis or immigrants from Asia or Europe. Drinking was most frequent among men in lower status occupations, though the opposite was true of their wives. Season had a marked impact on the quantity and type of drinking, the mean number of drinks per week reaching a maximum in late winter and a minimum in summer. More beer was consumed in summer and more spirits in winter.