Conversation so far:
What happened in 1915?
Jerome Kern introduced him to the writer Guy Bolton, who became Wodehouse's closest friend and a regular collaborator.
what did the two collaborate on?
This was Miss Springtime (1916), which ran for 227 performances--a good run by the standards of the day.
what did they do next?
The team produced several more successes, including Leave It to Jane (1917), Oh, Boy! (1917-18) and Oh, Lady! Lady!! (1918).
were there any other successes?
Wodehouse and Bolton wrote a few more shows with other composers.
In these musicals Wodehouse's lyrics won high praise from critics as well as fellow lyricists such as Ira Gershwin.
what other composers?
CANNOTANSWER.
Did he do anything other than musicals?
Bertie and Jeeves, Lord Emsworth and his circle, and Ukridge appeared in novels and short stories.
were his novels popular?
CANNOTANSWER.
did he collaborate with anyone else?
During the 1920s he collaborated on nine musical comedies produced on Broadway or in the West End.
were they successful?
He also wrote non-musical plays, including The Play's the Thing (1926), adapted from Ferenc Molnar, and A Damsel in Distress (1928), a dramatisation of his 1919 novel.
Are there any other interesting aspects about this article?
Though never a naturally gregarious man, Wodehouse was more sociable in the 1920s than at other periods.

Question: why more sociable in this time?
Self-contained rewrite: why was PG Wodehouse more sociable in the 1920s than other times?