The lobby area in an anime or video game convention where generally people tent
and look at their merchandise.
Example Man A: Where is Example Man B?
Example Man C: Last time I saw him was over at couch con with some girls.
"Tenting" or using a "tent" refers to the vieo game item "tent" which allows you to replenish all of your energy. In real life context, tenting is taking a break from any taxing activity.
Mall shopper A: Gosh, I'm tired. We've been walking a lot.
Mall Shopper B: Well, lets tent. We can sit on the couches then head to the food court.