```ruby
class ArcadeMachine < ActiveRecord::Base
  include HasImages
  include Slugged

  validates :title, presence: true
  validates :players, numericality: { only_integer: true, greater_than: 1 }

  has_many :machine_ownerships, dependent: :destroy
  has_many :users, through: :machine_ownerships

  has_many :subscriptions, dependent: :destroy
  has_many :playlists, through: :subscriptions
  has_many :games, through: :playlists

  has_many :api_keys, as: :parent, dependent: :destroy
  has_many :links, as: :parent, dependent: :destroy

  has_many :plays

  has_one :approval_request, as: :approvable, dependent: :destroy
  has_one :location, as: :parent, dependent: :destroy

  after_create :subscribe_to_defaults

  scope :approved, -> { joins(:approval_request).where("approval_requests.approved_at IS NOT NULL") }

  accepts_nested_attributes_for :links, allow_destroy: true,
                                        reject_if: proc { |attrs| attrs["url"].blank? }
  accepts_nested_attributes_for :location

  delegate :approved?, to: :approval_request, allow_nil: true

  def subscribed?(playlist)
    playlists.include?(playlist)
  end

  def as_json(opts = {})
    super(opts).merge({
      latitude: location.latitude,
      longitude: location.longitude
    })
  end

  private

  def subscribe_to_defaults
    Playlist.defaults.each do |playlist|
      subscriptions.create playlist: playlist
    end
  end
end
```

Add location to ArcadeMachine json.
user
```ruby
class ArcadeMachine < ActiveRecord::Base
  include HasImages
  include Slugged

  validates :title, presence: true
  validates :players, numericality: { only_integer: true, greater_than: 1 }

  has_many :machine_ownerships, dependent: :destroy
  has_many :users, through: :machine_ownerships

  has_many :subscriptions, dependent: :destroy
  has_many :playlists, through: :subscriptions
  has_many :games, through: :playlists

  has_many :api_keys, as: :parent, dependent: :destroy
  has_many :links, as: :parent, dependent: :destroy

  has_many :plays

  has_one :approval_request, as: :approvable, dependent: :destroy
  has_one :location, as: :parent, dependent: :destroy

  after_create :subscribe_to_defaults

  scope :approved, -> { joins(:approval_request).where("approval_requests.approved_at IS NOT NULL") }

  accepts_nested_attributes_for :links, allow_destroy: true,
                                        reject_if: proc { |attrs| attrs["url"].blank? }
  accepts_nested_attributes_for :location

  delegate :approved?, to: :approval_request, allow_nil: true

  def subscribed?(playlist)
    playlists.include?(playlist)
  end

  def as_json(opts = {})
    super(opts).merge({
      latitude: location.latitude,
      longitude: location.longitude,
      location: location.humanize
    })
  end

  private

  def subscribe_to_defaults
    Playlist.defaults.each do |playlist|
      subscriptions.create playlist: playlist
    end
  end
end
```
assistant