I also have my Sony Pocket e-reader handy, to show people how handy it is to use. Sometimes a friend will let me borrow his Kindle for the same purpose.
But I'll admit, I will not be using my latest official cover in public. Why? It's too damn HAWT! If I show it in a venue with anyone under the age of eighteen, I'm sure I'll be politely asked to take it down, or have customers shooting me evil glances. So I'll advertise it with the PG sample cover provided, but once the book is out, the R rated cover will be on the CD and only shown to the adults.
I've already stated that my status as a 'smut' writer (I prefer Adult Contemporay) has gotten me a few perks: Former classmates talk to me more; I've been given free wine; and the very fact I'm published with an honest-to-god publisher has earned me respect from aspiring writers and new authors.
I've made a few mistakes; I've disclosed too much information too soon to prospective friends, only to find out their ultra-conservativeness; I've accidentally let a tame curse word fly in mixed company (who knew a 'hell no' would bring an admonition? It happened!); and when I posted my wonderful Jimmy Thomas cover on Face Book, a few childhood friends (and my mother) expressed their disapproval. Mom's wasn't so bad; she just shook her head. But one friend went on a rant about eating habits of models. Huh?????
So now I'm more cautious about the content of my books. I've only got one scene which even sort of squicks me out, and I'm very careful when someone I know VERY WELL wants to read that book. I wouldn't want people to be turned off by a particular scene.
And when I'm promoting, I offer both a tame and spicy excerpt. Many times women want the spicy one, and I hope it generates sales, rather than an 'OMG...porn alert' moment.
Just as long as I don't get asked to leave or run out of town by the 'holier-than-thou' types, I'll continue to promote myself in public:)