Adam Clarke on Genesis 29:22

Laban - made a feast - משתה mishteh signifies a feast of drinking. As marriage was a very solemn contract, there is much reason to believe that sacrifices were offered on the occasion, and libations poured out; and we know that on festival occasions a cup of wine was offered to every guest; and as this was drunk with particular ceremonies, the feast might derive its name from this circumstance, which was the most prominent and observable on such occasions.