The company policy is to charge jumpseating pilots for drinks if they're in the cabin...even company pilots commuting are supposed to pay for drinks...I've never been charged for drinks and never seen any offline commuting pilots pay for drinks either. I have friends who are Part 135 on a paid ticket in a uniform are moved to the Big Front Seat and get drinks. Just call that number listed above, and it'll make life much easier.

Keep in mind the A320s have 1 jumpseat, all but 2 of the A319s have 2.
Welcome aboard!