Chicago Transit Authority riders now really know what time it is: Time to have sex in St. Louis.

The advertising firm of H&L Partners, which has an office in STL, has plastered ads on mass-transit trains in the Windy City that encourage Chicagolanders to grab a "weekend quickie" in St. Louis.

Accounts director Blake Padberg said the ads started running June 16 on commuter trains, and will run through July. The campaign is for the St. Louis Convention and Visitors Commission.

The ads show various St. Louis attractions, along with double-entendre urgings:

• "Size doesn't matter: We'll prove it." (Gateway Arch)

• "Hook up for a quick in and out." (Missouri Botanical Garden)

• "We're just looking for a two-night stand." (Urban Chestnut brewery)

• "If you're up for a good time, we're no strings attached." (City Museum)

"We always try to capture Chicago, to get them to try St. Louis," Padberg said. "And we thought we'd go with a 'dating service' theme this time, to capture a younger audience."

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