A planned event, the primary focus of which is a variety of cheap beer is served to the guests. It is often a neighborhood event or welcoming party, normally held during the summer.
Jake: Leslie just sent me an invite to her beer social on the 21st.

Ian: Dude! your first beer social since moving here... You're going to meet a lot of really cool folks at Leslie's place.

Jake: I'm so excited!
by Define Me! February 13, 2010

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