There was this “FBI warning” on fight club, which was an intentionally funny sign
Then there was this church sign, dunno if it’s a fake or not, but man did I laugh hard at it.
I saw a scarecrow in a field once, with a sign around his neck which read:
“Boo! Hiss!”
And also
Loses something in translation, but there’s a … um … male improvement clinic here in Israel whose slogan (and they got the national radio to air it!) goes something like: “If it isn’t hard for you… call us!”
It’s not fake – it’s supposed to make you curious enough to look up the passage:
I don’t know how great a pitch it is, though. It whiffs a little of Orwell’s “Ignorance is Strength,” painted on MiniTru. 
There’s a well-known dive bar in this town whose only remnant of its former incarnation is a sign that says VERRES STÉRILISÉES (sterilized glasses). The bar has been renamed Verres stérilisées.
There used to be an electrician here named D. Lord whose truck read “Let D. Lord light the way” I always got a groan out of that.
This classic double entendre sign was posted in a local Albertson’s grocery.
Here in Eugene there’s a run-down, out-of-business video store. The sign that’s still on the building says, in large letters, “(Name of business) Video Store!” In small letters underneath: “and tanning!”
With that business model, how could it have failed?
It’s also kind of funny to see a video rental place with a “For Rent” sign in the window.
Heh. In Vancouver, we used to have:
HANDLEBARS
BARBER SHOP
&
BICYCLE REPAIR
(The painted window featured a handlebar mustache framing the shop name, natch.)
There’s a restaurant chain called NORMS. No apostrophe, no lowercase letters. Just NORMS. The signs in the parking lots say “Parking for NORMS only.” I always wonder where the muties have to park. Lousy anti-radioactive segregationists.
I’ve seen a van driving around town for a local plumb-o-rooter business, with the slogan:
“BECAUSE IT HAPPENS”
A local church runs a soup kitchen called the Open Door. The sign out front says “The Open Door welcomes you. Entrance in rear.” My mom and I always crack up at that.
ooh! ooh! Y’all have reminded me of the name of a church I pass from time-to-time. It’s called
Christ Evangelical Free Church
We used to have a dentist sharing a building with a bank. What’s left these days is a large sign facing the street side:
GENERAL DENTISTRY
Drive Thru
A new Chinese restaurant just opened near my office. It’s called “King Wang.”
Every morning, I drive past a local BBQ joint. As long as I can remember, they’ve had this sign out front:
“EAT HERE EVEN IF IT KILLS YOU - We need the business.”
I occasionally pass a small, family owned garage in the “Little Chinatown” area of Houston. The name on the sign reads AUTO HO.
And I always wonder…
In Lebanon, PA, you can visit Loser’s Music Store. No boloney.