Admin can create an event and audience can ask questions

Hi I am trying to write tests for the feature wherein a admin signs up, creates an event and then someone from audience can join the event and then asks questions that are then sent to the admin for approval. Currently this is my integration spec file
require ‘spec_helper’

feature "Admin can signup" do
  
  scenario 'with valid email address and password' do
    sign_up_admin
    page.should have_content("Welcome! You have signed up successfully. Logged in as admin@admin.com.")
    page.should have_link "Logout"
    page.should have_link "Edit profile"
    page.should have_link "Create an event"
  end
  
  scenario "and create an event." do
    sign_up_admin
    create_event
    page.should have_css ".questions"
  end
  
  scenario "sees the questions that have been asked by the audience" do
    sign_up_admin
    create_event
  end
end

def sign_up_admin 
  visit root_path
  click_link "Sign up to create an event"
  fill_in "Email",with: "admin@admin.com"
  fill_in "Password",with: "a"*8
  fill_in "Password confirmation",with: "a"*8
  click_button "Sign up"
end

def create_event
  click_link "Create an event"
  page.should have_button "Create Event"
  fill_in "Name",with:"Oracle"
  click_button "Create Event"
end

I am stuck on this scenario

scenario "sees the questions that have been asked by the audience" do
  sign_up_admin
  create_event
  # ask a guest to join the event. and then post a question to be approved by the admin. 
end

So should I logout the admin, signin as a normal user, join the group, ask a question and then signin the admin again to check if the question asked exists?

Also what is the best way to let someone on a different browser notify that there is a new question? Should I use javascript polling or websockets?