More than 3,000 different beers are showcased at GABF. Breweries have to be commercially operating and licensed in the United States to get into GABF.
Get your souvenirs early on because the line to pick out t-shirts can stretch rather long as sessions came to a close.
The convention hall is laid out mostly by regions for beers.
Brewers also pour ice cold beer from cans and bottles, in addition to drafts.
Beer companies give out holders for tasting glasses. Mardi Gras beads help the can holders hang around people's necks.
At the Silent Disco, dancers get headsets to rock out, only bystanders have no idea what they're dancing to.
One brewery offers mock and real marriage ceremonies.
Breweries have a wide range of signage and booths. More than 700 breweries participate. The Great American Beer Festival (GABF) is in its 33rd year and keeps growing each year.
GABF attendees can even shop for jewelry made from recycled beer caps and cans.
Volunteer beer crew serve beer at sessions and earn free tickets.
One of the longer lines at the festival, for a buffet of cheese samples from the American Cheese Society.
You can take a break and sit in on educational seminars, such as pairing cookout foods with beer. This is a grilled peach served with sour beer.
49,000 total attend, an average of 12,000 per session.
There are other opportunities for fun and learning, besides drinking your dinner. Ticket holders can attend demos.
Many attendees pick up free tasting glass holders and hang the necklaces around their necks. It's considered a big no-no to let your tasting glass drop to the floor.
One man literally brought his "beer goggles."
Oktoberfest styled costumes are popular.
It's not uncommon for groups of friends to coordinate their costumes.
One of the more unusual headgear items, a hops hat.
Serious beer drinkers weave hops into their hair.
Bavarian style hats are popular.
A beer drinking warrior.
A hearty version of the edible pretzel necklaces, adding cheese sticks is a tasty twist.
Face paint mixes nicely with kilts.
"I almost felt like I was cheating on my husband. My night out was not a rendezvous with another man, but instead at the Great American Beer Festival," said Faith Mangan. "After I guiltily left my American IPA-loving mate at home this past weekend, I made my way to Denver's Colorado Convention Center for what’s been touted as the world's largest commercial beer competition and the country's largest ticketed beer festival."