I remember many years ago first hearing chair used as a verb and thinking it was odd. But with all language, usage makes the strange familiar. In the olden days, the person heading the committee was a chairman, no matter that person’s sex. Now chairman is used to indicate a male, chair is used for either sex, and chairwoman is frowned upon. Dianne Feinstein is the chair of the Senate Intelligence Committee, even when she stands up.
Theodore Bernstein, author of The Careful Writer and Dos, Don’ts and Maybes of English Usage, thought chair (v.) was a fad and spoofed its use by inventing some parallel words: He imagined people elevatoring themselves to their penthouses, getting dinner-jacketed and going theatering. Fortunately, none of those atrocities caught on, but today you can sit on a chair or guide a committee.