I can't drink because of a medical condition, so this is something I think about pretty often. There aren't many options that I'm aware of. Certain cafes/restaurants might stay open fairly late, which can be fun, but I eat vegan and those places don't tend to cater to that kind of diet.

a lot more places open 24 hours or just until 11-12 back in the early 2000s. Tip: Front range near waldo is one of the only coffee shops left open late.