This could be Fritz Leiber's The Wanderer.
Winner of the Hugo Award for best novel in 1965.
It was about some girl driving a car with her friends; they got led to some seashore, where there was a scientists' conference.
The main protagonists are three longtime friends. Paul Hagbolt is escorting Margo Gelhorn (and her cat, Miaow) to observe the lunar eclipse at an observatory in California.
They were discussing something about aliens, then I really don't remember much, but one of the scientists was communicating with these cat-like aliens telepathically.
Following on a whim a sign advertising a "flying saucer symposium", Paul and Margo fall in with a group of intellectuals, dreamers, charlatans and misfits.
In the saucer Paul meets a being calling itself Tigerishka. A large, female telepathic feline creature, she initially mistakes Miaow as the intelligent being whose thoughts she can hear, and Paul as a "monkey".
In the end, I remember that he visited some spaceship near another planet.
Paul and Don are evacuated in Don's ship, placed into position close to Earth by Tigerishka.