Is there an epistemological word that means "one who solicits prostitutes"?

I'm not certain that I'm phrasing my question correctly, but I couldn't think of a better way to word it. What I'm asking is for a word that truly defines to mean a person who solicits prostitutes. I've heard of the slang word "john", but that's not a satisfying answer to me. "Whore" and "prostitute" unambiguously mean a person, connotatively female, who trades sexual favors for money, with whore being more derogatory and prostitute more meaning the actual profession. "John" doesn't quite do this, it's meaning isn't so clearly explicit in the word.

So, is there a word that does this? As a secondary question, if there is not a word in English, is there one in another language?

An example of how this word would be used: We can't keep the blanks away from the new escort service that opened downtown.

Solution 1:

In the US and Britain, the crime of offering to pay for sex is called solicitation, which is always illegal in the US and illegal in public in Britain. The term solicitor, however, was already taken. [Insert your own prostitution joke here] Traditionally, no matter what the law said, authorities penalized the seller and ignored the buyer. Where the law has reversed that (e.g., Sweden), the shaming term of art is sex buyer. Where the law has butted out (e.g., Holland), the more neutral term is client. Anglophone prostitutes (which isn't as seamy as it sounds) call their customers, johns, tricks, or scores.

Solution 2:

Patron might be a good candidate as it means:

A regular customer, as of a certain store or restaurant. [Wiktionary]

Its verb form "patronize" means:

To go to as a customer, especially on a regular basis [The Free Dictionary]

It is broadly used in the media and the law to mean the opposite of solicit:

The following in NY Times shows its usage:

Without sex buyers, there wouldn’t be sex trafficking. Currently, however, buyers are not being prosecuted under federal law. Representatives Ted Poe and Carolyn Maloney and others have introduced an important bill that would remedy this by expanding the Trafficking Victims Protection Act to penalize those who solicit or patronize sex trafficking victims.

Solicit means:

To offer to perform sexual activity, especially when for a payment. [Wiktionary]

Solution 3:

I can't seem to think of a word in English, but the French term for a hooker's client is micheton.

Blanche has been driven around by cabbies who claim to be gentlemen temporarily down on their luck, and spent high-paid nights with michetons who boast that they began as coal miners. Miami Herald

Solution 4:

Whoremonger:

a customer of a prostitute

This is by definition the word you are looking for.