Creating a card class with specific rank and suit, then create a hand of several cards and checking if it has any face cards

card.rb

class PlayingCard

  attr_accessor :rank, :suite
  def initialize (rank, suite)
    @rank = rank
    @suite = suite
  end
  def face_card?
    ['K', 'Q', 'J'].include?(@rank)
  end
  class << self

    def hand (hash_of_cards)
      @hand  = []
      hash_of_cards.each do |rank, suite|
        hand_part = PlayingCard.new(rank, suite)
        @hand << hand_part
      end
      return @hand
    end

    def has_face_card?
      @hand = PlayingCard.hand({'7'=>'spades', '4'=>'diamonds', 'K'=>'hearts'})
      @hand.each do |card|
        if card.face_card?
          puts "Face card!"
        else
          puts "Not a face card!"
        end
      end
    end
  end
end

hand1 = PlayingCard.hand({'7'=>'spades', '4'=>'diamonds', 'K'=>'hearts'})
puts PlayingCard.has_face_card?