Dog may be man's best friend, but not necessarily yours. If you have vistors bringing along their four-legged companions, put them up at the Loews Denver Hotel. Like the city of Denver, Loews touts itself as "pet friendly" -- and then some. The hotel offers pet room service, with vet-approved food (vegetarian entrees are available for picky pets); special bedding to ensure the animal gets a good night's sleep; a personalized note from hotel management welcoming the critter and listing local vets, groomers and pet stores; pet-walking and -sitting services; and, of course, treats and toys. Loews doesn't discriminate, either: Along with the usual dogs and cats, past guests have included lizards and monkeys.