<div class="wrapper">
  <h2>Activity feed</h2>
  
  <div *ngFor='#checkin of checkins'>
    {{ checkin.created_at }}
    <b>{{ checkin.beer.beer_name }}</b>
    {{ checkin.venue.venue_name }}
    <i>"{{ checkin.checkin_comment }}" -{{ checkin.user.user_name }}</i>
  </div>

</div>

<div class="wrapper">
  <h2>Activity feed</h2>
  
  <div *ngFor='let checkin of checkins'>
    {{ checkin.created_at }}
    <b>{{ checkin.beer.beer_name }}</b>
    {{ checkin.venue.venue_name }}
    <i>"{{ checkin.checkin_comment }}" -{{ checkin.user.user_name }}</i>
  </div>

</div>

Fix ngFor to new syntax
Fix ngFor to new syntax
