As much as I love my gym, they don't like chalk to be used inside.
I climb on a regular basis, so I have tons of chalk begging to be used when I deadlift, but my chalk bag and chalk sock make too big of a mess.
Currently, I'm in Phase 1 of EC's Maximum Strength program, and day 3 calls for rack pulls. Last week, I had to keep wiping the bar down between reps because of my sweaty-ass hands.
One of the guys at my climbing gym overheard me lamenting my sorrows about not being able to use chalk, and he gave me a tube of Tite-Grip (god, this sounds like a fucking sales pitch. I promise that it isn't). I tried it out yesterday when doing rack pulls and was pleasantly surprised. It didn't feel as good as chalk (a little sticky), but it kept my hands from sweating. It washed off after a couple handwashings and didn't leave any residue on the bar or my clothes.
I've heard that Metolius (they make chalk for climbing) makes a product similar, but I haven't tried it. Just thought I'd give you guys a heads up on a decent chalk substitute.