While searching San Diego craigslist for someone willing to clean my hardwood floors twice a month, I stumbled upon a "Flirts for Hire" service:

Is your boyfriend, girlfriend, husband, wife not giving you the attention you deserve? Hire us, we will send someone over to bars, restaurants, clubs to flirt with you in from of them. They will get jealous in a heart beat. No physical contacts involved. No kissing, or any form of sexual activities. Just good clean fun.

I suppose this is a more real-life version of having an imaginary girlfriend. When I did a google search to find out if there were other Flirts for Hire services around the country, I found a 2003 article from news.com.au about a more sinister version of this practice:

Kirri Cleveland... is the 30-year-old going on 13 who is starting a "flirts for hire" operation that sounds like a schoolyard game, but actually is being put up as a legitimate going concern. With any luck, her enterprise - where female "spies" tempt men into being unfaithful and then dob on them - will be a dismal failure. But its very existence is damaging enough with the wedge it is attempting to drive between the sexes...
Professional flirts will be paid to deliberately cause other people grief. At least garden variety adulterers - even if they do ultimately hurt a third party - are not financially rewarded for their misdemeanors. Ms Cleveland denies her service is entrapment. Well, that is a matter of opinion...
Ms Cleveland says it is mainly women who want to engage a "flirt for hire"... She also claims 50 to 60 per cent of men will take the bait.