Identify this time travel (?) movie.

Cafe Society
1

I have a foggy recollection of a book I enjoyed when I was younger. All I can recall is that a junkie prostitute gets accidentally caught up in the travels of a guy who is (I think) a time traveler, or possibly some kind of Dr. Who-ish dimensional jumper and as a the book goes on gets gradually more with-it and competent.

EDIT: I meant to say “book” in the title, not “movie.” Could someone fix it, if possible?

2

Mindkiller, by Spider Robinson?

3

If there’s memory control involved that’s it, but Robinson’s work has gone out under multiple titles, Lifehouse and Deathkiller might ring the bell if Mindkiller doesn’t. (Assumning that’s the work in question.)

4

I didn’t watch that book.