Pizza was probably the better option over whatever may have been available "for sale."
DIA was bullt in an area long known for convective storms. They called it the ALL WEATHER AIRPORT, not because it could operate in all weather but because ALL WEATHER could occur there on any given day, year round.
Depending on the wind, up-slope, or down-slope they can get snow and 70 temps in a 24 hour period. When it does snow, it usually goes away very fast because of atmospheric frictional heating from the W wind.
Weather wise, It's not the best place for an airline hub,