Joe Biden and his wife Jill ventured out in Santa Monica, Calif., amid his battle with cancer, Page Six is told. Spies spotted the former first couple at celeb favorite Giorgio Baldi with Scott Miller, the former Ambassador to Switzerland, and his husband, LGBTQ+ activist Tim Gill. Fellow diners told us that Joe — who was diagnosed in May 2025 with an aggressive form of stage 4 prostate cancer that has metastasized to his bones — was quiet for much of the dinner, but piped up to sing “Happy Birthday” to guests celebrating at a neighboring table. “Jill did most...