My fiance and I are relocating from California to Colorado... We wanted to live in the Boulder or Denver area ?

There are several towns near Boulder or Denver that are nice...Louisville, Longmont or Prospect, Erie, Lyons, Winchester, Broomfield. If you live in Erie, you can just get on I-25 to head to Denver. 36 goes from Denver to Boulder. Boulder's nightlife is on Pearl Street or near the university. Go to the Shag Lounge and Double Daughters in Denver.