On draught
Definition 1 of 1
Pro Tip 1/3Cultural Preference
Some cultures highly value draught beer for its freshness; pubs often highlight their on draught selections. 
The pub showcased an array of local beers on draught, a point of pride for the establishment.
Pro Tip 2/3Quality Perception
Many beer enthusiasts believe beer on draught tastes better due to less oxidation compared to bottled beer. 
I think you'll find the stout tastes richer on draught than in the bottle.
Pro Tip 3/3Social Settings
Ordering on draught is common in social settings, like bars or events, where draft systems are available. 
At the festival, everyone seemed to be enjoying the local ale on draught.