(I am a hobbyist beekeeper)
Interesting that a bee would be attracted to beer... Not much in there I can think of that they'd like in the beer, aside from water. That said, this time of the year is the honey / nectar dearth (shortage) in North America, so they will naturally be attracted to sugar in any form, soda's included.
Keep your eyes / ears open for swarms this time of yes, too - swarming honeybees are GREAT to capture / keep and are typically passive due to their "journey" mode.