Amongst the particular candidates you have listed, the one most likely is Llira. Since Ed Greenwood's very first pantheon for the FR (published in Dragon Magazine #54), Lliira has been described as the goddess of "joy, carefree feeling, contentment, release, hospitality, happiness, dance" and she is a "patron of festivals". According to the 2e Faiths and Avatars (page 97-99):
Lliirans have a well-deserved reputation as festival animals, and more than one adventuring company has found an empty till when it left the Lliran priest in charge.
Another good candidate is Sharess/Bast (of the Faerunian as well as the Mulhorandi pantheon), goddess of hedonism, excess, lust, sensual fulfillment, festhalls, cats and pleasure seekers.
Finally, there is also Saint Dionysus. He is mentioned in Faiths and Avatars as one of the many saints of the god Ilmater (page 76). He is the patron saint of wine and other alcoholic spirits.