I'm always here, but unfortunately I can't get anyone to pick up my TechEd tab.
Sometimes Bourbon Street really gets to be too much, and if you're tired of the food and music (the music scene is somewhat concentrated on Frenchmen Street), there's a quite a few other things you can do, even around the restricted times of the conference schedule.
I think you'll probably be mainly out of luck at the Cabildo, Presbytere, Old Mint, Mardi Gras World and other museums which are only open during the day.
However, the New Orleans Museum of Art (http://www.noma.org/ - take the red Canal streetcar to City Park) should be open until 8pm on Wednesday, and the Sculpture Garden is open until dusk. The Park has a lot of amenities right there (http://neworleanscitypark.com/) - there is a Thursdays at Twilight concert series in the Botanical Garden.
You can take the streetcar up St. Charles just for a ride, and Audubon Park and the real Zoo (not open late - but they serve beer) are right there uptown.
And uptown - Magazine @ Louisiana around the Bulldog, Tchoupitoulas around Dos Jefes - there are quieter restaurant and bar scenes which are great.
Enjoy your stay!