I travel a lot. I always have a bag of chalk and a bottle of liquid grip in my travel bag. I'd prefer the chalk but if it's not allowed the liquid grip is as close as your going to get.
No one thinks twice about you pulling it out and squirting it on your hands. Most of the guys at the gym probably think I'm using that alcohol crap to sterilize my hands.
It goes on like a creamy liquid and once it dries you have chalk on your hand.
The little bottle says its good for over 30 applications. The way I use it I may get 20. You can buy a big bottle much cheaper and refill.