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HTML 

              
                <div class="events">
  <a href="#" class="event" style="background-image:url('http://www.lorempixel.com/600/600/people')">
    <div class="shadowbox">
      <h3>Beer and Cheese Tasting Event</h3>
      <p><strong>Date: </strong>May 28 @ 8:00 pm</p>
      <p>Come eat some delicious cheese and drink even more delicious beer with us!</p>
    </div>
  </a>
  <a href="#" class="event" style="background-image:url('http://www.lorempixel.com/600/600/abstract')">
    <div class="shadowbox">
      <h3>Cheesecake Extraordinaire!</h3>
      <p><strong>Date: </strong>June 18 @ 4:00 pm</p>
      <p>Come eat some cheesecake and try our Belgain Trippel pairings!</p>
    </div>
  </a>
  <a href="#" class="event" style="background-image:url('http://www.lorempixel.com/600/500/people')">
    <div class="shadowbox">
      <h3>4’th of Ju Luau</h3>
      <p><strong>Date: </strong>July 4 @ 5:00 pm</p>
      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Dicta dolore sit magnam, eveniet id aperia</p>
    </div>
  </a>
  <a href="#" class="event" style="background-image:url('http://www.lorempixel.com/800/500/abstract')">
    <div class="shadowbox">
      <h3>Free Beer Tasting</h3>
      <p><strong>Date: </strong>July 24 @ 8:00 pm</p>
      <p>Come one, come all and try our newest beer. &nbsp;Free!</p>
    </div>
  </a>
  <a href="#" class="event" style="background-image:url('http://www.lorempixel.com/600/600/cats')">
    <div class="shadowbox">
      <h3>Kegs and Eggs</h3>
      <p><strong>Date: </strong>March 12, 2017</p>
      <p>An annual Saint Patrick’s Day celebration held in Albany, NY. There are two ways one can go ab</p>
    </div>
  </a>
</div>
!

CSS 

              
                * {
  transition: all .125s ease-in-out;
}

a {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
  text-decoration: none;
}

h3 {
  font-family: sans-serif;
  margin-bottom: 20px;
}

.events {
  display: flex;
  flex-wrap: wrap;
}

.events .shadowbox {
  height: 400px;
  padding-top: 0;
  background: rgba(0, 0, 0, 0.5);
}

.event {
  text-align: center;
  margin-bottom: 200px;
  min-width: 100px;
  background-repeat: no-repeat;
}

.event h3 {
  padding-top: 50px;
}

.event {
  background-size: cover;
  background-position: center;
  height: 400px;
  flex-grow: 1; // This is what makes everything magically grow and shrink.
  margin-bottom: 50px;
  flex-basis: 0;
  text-align: center;
  margin-bottom: 200px;
  min-width: 100px;
  background-repeat: no-repeat;
}

.event:hover {
  flex-grow: 2; // On-hover the item will grow to double the width, shrinking the rest automatically
}

.events .shadowbox:hover {
    background: rgba(0, 0, 0, 0.3);
}

.event h3,
.event a,
.event p {
  color: white;
  width: 90%;
  margin: auto;
}

.event:not(:first-of-type) {
  border-left: 3px solid white;
}


/*
I usually use
@media (orientation: portrait) and (max-device-width: 775px)

For this, but for the sake of display, I changed it to a query that changes without mobile emulation.
*/

@media only screen and (max-width: 775px) {
  .event:last-of-type {
    margin-bottom: 30px;
  }
  .event:hover {
    flex-grow: 1; //Disables the growth behavior on-mobile
  }
  .event:nth-of-type(1) {
    min-width: 100%; //Forces the first element to be full-width
  }
  .event {
    min-width: 300px;
    margin-bottom: 3px;
  }
}
!

JS 

              
                /*
Nothing to see here ;)
*/
!
999px

Console