I have to disagree slightly with VectorOne’s opinion of the EI Dub lounge.
Yes there is a charge of 25euro for those who are not members of the Gold Circle club, but bear in mind that not all airlines allow lounge access to non-ffp members.
An airline lounge is not just about food: there are hot & cold drinks, work areas, and a quiet area in which to relax. Not forgetting the showers: something very important to some passengers, particularly those with lengthy stopovers.
Incidentally, I have experienced the MAN escape lounge and found it quite pleasant.