Simple thread based chat server

chat.rb

require 'socket'

class Client
  def initialize server, socket
    @server, @socket = server, socket
    start
  end

  def send message
    @socket.puts message
  end

  def start
    Thread.new do
      @socket.puts "Hi, what's your name?"
      username = @socket.gets.chomp
      @server.broadcast "#{username} joined"
      while recv = @socket.gets
        msg = "#{username}: #{recv.chomp}"
        puts msg
        @server.broadcast msg
      end
      @server.kick self
      @server.broadcast "#{username} left"
    end
  end
end

class Server
  def initialize
    @clients = []
    @server = TCPServer.new 2000
  end

  def kick client
    @clients.delete client
  end

  def broadcast message
    @clients.each do |client|
      client.send message
    end
  end

  def start
    puts "Server start listening on port #{@server.addr[1]}, waiting for connections..."
    loop do
      socket = @server.accept
      address_family, port, hostname, numeric_address = socket.peeraddr
      puts "Connected from #{numeric_address}:#{port}"
      @clients << Client.new(self, socket)
    end
  end
end

Server.new.start