Three hotel-casinos owned by Harrah’s Entertainment are now allowing guests to bring along their dogs for an extra $25 a night. The offer applies to rooms at Caesars Palace, Imperial Palace and the Rio, and includes treats, water and food bowls, a canine-friendly room-service menu and outdoor areas where pooches can do their biz. The dogs can’t weigh more than 50 pounds, and only two dogs can stay in a room. For more information, visit Harrah’s online.