Well sports continued in many forms, College Football for instance.

Played just after the war ended obviously while demobilization was still on going the 1946 Army - Notre Dame football game is one of the contenders for "Game of the Century"

The #1 vs #2 matchup was played before a sold out crowd of 74k in Yankee Stadium, and ended in a 0-0 tie.

It also holds the record for most eventual Heisman Trophy winners to play in a single game for army you had Doc Blanchard ( Mr. Inside) and Glen Davis (Mr. Outside), and coached by Earl Blaik in the midst of a 3 year run of National Titles.

Whilst the Fighting Irish were led by Johnny Lujack and Leon Hart, and coached by Frank Leahy, recently released from service as a LT in the Navy, who would finish with the second best winning percentage in the history of college football even today (107-13-9 or a .864).

It can be hard to find things unconnected to the war. Would the Zoot Suit Riots have happened if there hadn't been so many Navy vessels in port, and commanders willing to declare a dungaree liberty on the city of Los Angeles? Would there have been race riots in Detroit if the city weren't overstuffed with war workers? Harry James wouldn't have taken over the Chesterfield Show if Glenn Miller hadn't talked his way into the Army. Hollywood was awash with war films and the bookstores with war-related fiction and fact. Say, Victory through Air Power or Paris Underground. Casablanca was a product of the war.

For all that, art goes on. Duke Ellington played Carnegie Hall in 1943, not long before Oklahoma debuted on Broadway, the first musical with the tunes really integrated into the plot. Disasters happened, whether the Coconut Grove fire in Boston or the Hartford circus tent fire. Infrastructure finished included the Grand Coulee Dam and, if you allow, the Pentagon Building and the Alaska Highway.