This is a very common question.
Here's how you write an encounter:
First open the city forum. The city and state metro forums are located on the ECCIE homepage. Scroll down the page after logging in and you will begin to see a list of metro areas, the further you scroll down the more there are. If you do not see your exact city listed look for a large city near yours, common name of your region or simply the state name itself. Once in that metro area forum you will see all the hobby related forums including several encounter forums, again, you must scroll down the page to see all the different sub forums.
Open the encounter forum that matches your session (Independent, AMP or Strip Club).
In that forum is a button labeled "New Encounter" near the left portion of the page about 3 inches down from top.
Fill out the template and be sure to thoroughly describe the session in The Rest Of the Story. All approved Encounters earn six weeks of free Premium Access.