In a surprising move, Infinity Radio has converted 20-year modern rock bastion WHFS Washington, D.C., to Spanish, as "El Zol" 99.1. The station will play a mixture of salsa, merengue and bachata, targ

In a surprising move, Infinity Radio has converted 20-year modern rock bastion WHFS Washington, D.C., to Spanish, as "El Zol" 99.1. The station will play a mixture of salsa, merengue and bachata, targeting adults 25-54.

"We have made clear our desire to expand into this burgeoning market and believe this move marks an important step in our commitment to Spanish radio," Infinity president/CEO Joel Hollander says in a statement. "There exists a tremendous opportunity for Infinity to launch a Spanish-language format in Washington, D.C., where almost 10% of the population is not being directly served."

In October, Infinity acquired an equity interest in Spanish Broadcasting System Inc., which served as a consultant for the WHFS switch.

WHFS was one of the country's original free-form progressive rock stations in the '60s, evolving to modern rock in the mid-'80s. It spawned the HFStival, the granddaddy of station festivals and a perennial summer concert box-office leader.