Yes, U.S. pilots did indeed drink during World War II, and alcohol played a somewhat prominent role in the lives of many military personnel, including airmen. While the military generally discouraged excessive drinking, it was not uncommon for pilots to have access to alcohol during their downtime, and it was sometimes even part of their routine.
The U.S. military had established rations of alcohol for soldiers during the war, particularly for combat veterans who were under extreme stress. This was especially true for airmen, who faced grueling missions that often involved long hours of stress and danger. Alcohol was seen as a way to unwind and cope with the psychological toll of combat. In fact, many pilots in the European Theater, for instance, would drink before or after missions as a means of relaxation.
Pilots sometimes consumed alcohol in informal settings such as officers' clubs or military bars. For example, at U.S. bases in the Pacific, it was not unusual for aircrews to have access to beer or whiskey in their downtime after a mission. In some cases, airmen would also carry small bottles of liquor on their aircraft, though this was not officially sanctioned. A popular drink among soldiers, including pilots, was "rum rations" that were provided to some in the South Pacific.
However, the military was also aware of the potential dangers of alcohol consumption, particularly in relation to flying. Pilots were expected to maintain a high level of readiness, and drinking was generally prohibited before flying. The "eight-hour bottle to throttle" rule was enforced, which meant pilots had to refrain from drinking alcohol for at least eight hours before a mission to ensure they were sober and fit for duty.
While drinking was a part of life for many pilots during World War II, it was always a balancing act between relaxation and the need for operational readiness in combat.