I have found that sometimes they have a bottle of wine out in the mid galley if there are two J cabins. Oddly enough, I never ask for a alcohol drink midflight, but there is always someone around and they will ask if you want something when they do the rounds. 4/5 flights, the FAs and especially the SDs specifically ask me. Have a midflight snack. it's fun and they bring wine with that if you want.