Rondo seems to be away from his computer, so I'm going to have to take full author-i-tie on this one:
FASCIST COMMISSIONER RULING
You can select a seasonal beer to serve year long - but you're taking the whole line of beers.
For example, if I wanted to serve Sam Summer all season, I'm taking all of Sam Adam's seasonals and just opting not to sell the others.
You can't take a seasonal beer that's already been selected.
----
Clear?
Meh, I understand it, but I don't get why you need the whole season if you just want one beer.
For instance, I love Sam's Oktoberfest, and Rondo loves Sam's Summer...why couldn't Rondo just serve Sam's SUmmer year-round and I just serve Oktoberfest year-round.
By picking the seasonals what you're selecting is not really a beer, but a variety of beers that change from a brewery you appreciate.
By selecting a beer, you're kinda just selecting a beer, right?
And seasonals aren't limited to 'Sam Summer' or 'Winter Warmers'. There are all kinds of seasonals that might be a bit more appealing year-round. My favorite seasonal for instance is Troeg Brewery's Nugget Nectar, which is a spring seasonal. But, its the most BA hopped-up American Amber I've ever had.