Hilton, Concord, CA: Booked a king deluxe room, got "upgraded" to a higher floor with a view of the dried up river behind the hotel. Got access to the Executive lounge where breakfast was served.
Hampton Inn, Oakland Airport: Booked a standard king room, got upgraded to a suite with a kitchenette and huge bathroom.
Hilton Resort, Myrtle Beach: Booked a king oceanview Room. Asked at check-in for an upgrade and was told I was already "upgraded" to a higher floor. Ocean-view rooms face 45-degrees away from the beach. Got a nice view of the pool deck and adjacent high-rise. No bathrobes, no slippers.
Hampton Inn, Colton, CA: Booked a standard king room, got upgraded to a suite. Huge room with a kitchenette, couch, coffee table, desk, and huge bathroom.