Prostitution in Denver and Minneapolis will spike during the political conventions held there in the coming weeks, experts say, and online ads indicate sex workers are preparing themselves.

"Republican Convention Party Entertainment -- Hostesses wanted," reads the headline of one "erotic services" ad from the Minneapolis area on Craig's List, the popular classified-ad Web site.

In the advertisement, the unnamed outfit said it was looking for "fun, outgoing" women to help entertain "High-end clients" during the convention, expected to bring tens of thousands of delegates, reporters, lobbyists and volunteers to the Twin Cities in two weeks.

The company did not respond to an emailed request for an interview. A recorded message for the phone number listed in the ad did not allow a message to be left.

In Denver, where the Democrats will hold their convention next week, a Craig's List "erotic services" ad titled "DNC Delight" beckoned, "Help me celebrate democracy," and promised a tall, blue-eyed, dirty-blond "Rebecca" will come to a visitor's room ("I only do outcalls to hotels").