He was perhaps the greatest showman and promoter the world has ever seen... Tom Thumb, Dumbo, bearded women, the snake man, etc. Barnum would find whatever he thought would excite the public.. and he gave it to them with fun and flair. When he brought the circus to town later in his life, there was so much forward publicity that he rarely had to do any advertising or promoting on his own. Free advertising, and a lot of it.
Now I would be remiss if I didn't say that he made a large part of his fortune scamming people. What he did do though is lead people's imagination in ways they had never experienced...and his shows did deliver.
I honestly think there's an honest little P.T. Barnum in all of us. A part that has fun promoting our businesses, blowing our own horns with creativity. I'm sure there are great offerings that you have that your own customers (and even family!) don't know about. That's a shame. Find a good ad medium and shout it to the world. Be honest and have fun...this creative side has never been needed more!
And by the way...the sign that read 'This Way to the Egress'? Everyone but the English teachers were excited until they were ushered out of the building and learned... Egress is another word for 'Exit'.