....not only about the type of lady you are looking for, but, are you looking for an incall, outcall, approximate time of day you wish to meet, how many hours, etc?  Keep it simple:

Hello Ladies,

  I am looking for company today/this evening, in the ***** area of NoVA, DC, at approximately ****, for ** hours.  Outcall (or incall) preferred.  

  You get the idea.  

Hugs and Kisses,
Kelly