title_body: Are there any problems in serving non-cooled beer?
upvoted_answer: This article has very good information on how CO2 interacts with beer.  
  
  That being said, temperature plays a big part in the flavor of beer. Here is a the consensus of guidelines of what temperature types of beer and wine should be served.  
  
  There should be nothing wrong with refrigerating your beer and then warming it up. I really enjoy the flavor profiles in a lot of the darker, heavier beers I pour when they warm.  
  
  Just make sure that you clarify what temperature your fluids need to be before ingesting with your physician.