Some examples of funny signs are "Eat here or we will both starve," "No free Wi-Fi so talk to each other and get drunk" and "Boss lady asked me to change the sign, so I did!" Sometimes, factors such as the sign's location or business type contribute to humor.
An example of a sign that is funny in context is a Burger King sign saying "R.I.P. McDonald's," as construction workers were demolishing the McDonald's across the street. Because some people have an aversion to getting their teeth worked on, one dental office used the sign "Less painful than an episode of 'Jersey Shore'," referring to a notorious reality show. Another example of a funny sign is a windshield repair business using the message "Show us your crack."