They're seen in quiet bars (5)
I believe the answer is:
rests
'they're seen in quiet bars' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rests that I've seen before include "Pauses; relaxes" , "Relaxes, sleeps" , "holidays" , "Takes one's ease" , "Musical pauses" .)