You never know who may be on the other side of a closed door or in the elevator with you. Gossip will not make friends in the world of publishing. Use your time wisely. Attend as many workshops as you can, using the time to network with others. Don't be afraid to walk into or out of a workshop while it' s still going on.
Speakers understand that attendees have appointments to keep.
Don't cling to your friends, as tempting as the comfort is. You're there to network and make new contacts. Finally, take time for yourself in the madness of things. Hide in your room for an hour if you need to, or schedule that indulgent massage. Someone recently asked me how they can receive notice that the new newsletter has come out without checking this site every day.