Bay seniors hungry for a meal of historic proportions are invited to a lunch and tour of that pile of Edwardian splendor known as the Palace Hotel. Rebuilt in 1909 after the earthquake, its Beaux Arts glories are still firmly intact. Lunch is in the palatial Garden Court and the menu and price are both retro. Entrees include turkey scaloppini and chicken salad croissant. Dessert this month is chocolate cheese cake. Price $25.Tours are Saturday and Tuesday at 10, Thursdays at 2. Free.