Denver's most expensive neighborhood for renters costs more than twice as much as the city's cheapest neighborhood. That's according to San Francisco-based Zumper, which determined that asking rents for a one-bedroom apartment in the Golden Triangle neighborhood south of downtown were a median (half were higher, half were lower) of $2,275 in October, which is the priciest in the city. On the cheap end, head to Villa Park on the city's western edge, where asking rents rents for a one-bedroom apartment…