No Tell Motels are not a flea bag hotel, some are very nice with indoor private pools, extra large whirlpool tubs and most include room service.
They usually have a 4 hour/8 hour/ all day rate. Cable TV and AC. All include private, indoor parking garage and most even have breath mints in the ash tray although a bit chewy and not much flavor from what I hear.
I have never heard of one not accepting dogs, you head straight to the first available garage, close the door and pay for the room via a lazy Susan. You don't see them, they don't want to see you.