Wilderness Exchange is within walking distance of Union and they require you leave a bag with them when you go into the store, they may be willing to stash your bag for a few hours. No guarantee on that, but an option if you can't find anything else. They are only open 10am-6pm on Sundays, so you may have to wait around a bit or pick it up early depending on when you get there and will be leaving.
Other advocates of lockerless schools also cite reasons such as reducing noise by eliminating the clang of dozens of locker doors,[1] or creating a more appealing environment aesthetically. It has also been claimed that removing lockers provides good training for students by forcing them to be more efficient in managing their books, and taking the time to plan what books they will need, and carrying only those ones.
Perforated lockers are similar to the standard types of locker, but the door and walls are made largely or entirely of perforated steel, with hundreds of holes creating a strong mesh arranged in a diagonal pattern. This is used where good ventilation is required, or where, for security reasons, it is necessary that the contents can be examined visually while the doors are locked.
Don't take chances with a small storage company that doesn't have the nationwide resources like CubeSmart to ensure that customer service is prioritized. We're in it for the long-haul and we recognize that your satisfaction is instrumental to our success. We think you should expect more from storage and our locations in and around Denver are ready to exceed your expectations. 

In the case a lock is broken or lock combination is forgotten or lost, items from a locker will be returned only (a) to the person providing proof of identity and proof of renting the locker that match the identity of the individual listed with Operator as the renter and (b) upon payment of any outstanding rental fees or other costs. The Operator is discharged from liability if it releases property in a locker to any person providing accurate proof of identity.
When it comes to adventurous living, Denver ranks as one of the most outdoorsy cities in the United States. Whether it’s hiking up mountains or skating down the winding mountain-roads in nearby Boulder, Denver is a great place to be outdoors and enjoy that adrenalin rush. So naturally, if you have a long stopover in Denver, or quite a bit of time on your hands before that big conference, you’ll need to find Denver luggage storage so you can make the best of it.
Officeworks School List Service is backed by our Parents Price Promise - ‘Find an identical stocked item on a quoted school list at a lower price and we’ll beat it by 20%’. For 2019 school lists, the Parents Price Promise is only applicable on prices that appear on valid 2018 school book lists for the quantity listed. Valid on identical stocked or Officeworks-deemed equivalent items where identical products are not available. Excludes competitor out of stocks, categories or items not ranged and items available only for customer order at Officeworks. Offer available from 01/09/18 to 11/02/19. Cannot be used in conjunction with Officeworks’ 5% Price Guarantee.

Denver Lockers