when we were there in March the beer was out, no need to ask anymore, and yes, Heineken was definitely available. I think there was also a light beer. I'm not a beer drinker though so can't recall exactly what it was.
Since the OP was asking about Heineken just thought I let them know from experience when getting a bottle of it at the Atrium Club at the Contemporary, they are the only Beer where you need a bottle opener to get it open. The other Beers they had like Budweiser and Bud Light would open up without the bottle opener.