Siarra .. The signs are the kind of thing that people would just do themselves if needed. If you want people to use your signs over their own/others, I'd suggest making them more appealing, visually.
For a start make each sign suit what it's portraying. Why is every sign yellow? Why does every sign have the same font? How many signs do you see around you that have the same font with the same background on it? Hardly any!
My suggestion would be to add dumbells next to the gym sign, A book next to the school you know, that sort of thing.