The CHEERS names not everyone knows

CHEERS is 30 years old.  Tonight there is a reunion party for those of us honored enough to be part of the show.  Will let you know how it goes.  I wonder if anyone besides me will not have aged in all that time.  Anyway, you all know the stars.  But what about the others who populated the bar?  I thought today I'd recognize them so the next time you watch you will too.
 


First up is Al Rosen