PGAV just released findings of their Food, Beverage, and Retail study on the role of alcohol at theme parks. Although theme parks aren't the same experience as that of a smaller community-based entertainment venue (LBEs & FECs), it isn't unreasonable for the findings to also apply to them.
The study found that the availability of alcohol positively impacts spending intent, ranking 3rd in the top 5 most important food and beverage characteristics that affect spending:
The study found domestic beer is the most popular option (46%), followed closely by wine (44%). Local brands were next in the ranking at 35%.