Postcards / Invites / Direct mail back to portfolio of services
Postcards can be a quick and cost effective way to let your mailing list know about a special event or promotion.
A Cherry Creek art gallery promotes a unique show.
Direct Mail announcement for a benefit concert
Isabella's Fine Lingerie promotes their new Denver store.
Ashley: an aesthetician offers a holiday special. 
Daily Wag : promotional postcard for new business. 