When I saw this thread I started thinking and came up with the following list. Mind you, a lot of these sightings were years ago, before many of these people became "famous"

Dermot Mulroney
John Tesh
Paul Rudd
Calvin Klein
Bruce Willis
Tommy Haas
Cameron Matheson
Tyler Matheson
Ben Stiller
Jerry Stiller
Lorenzo Lamas
Richard Chamberlin
Mathew Broderick
Michael Bergin, almost forgot
John-John Jr. Kennedy - a truly gorgeous man