Another note, technically, alcohol does not break a fast. It may not be in the spirit (get it?) of a penitential day, but it isn't considered a "food."
What the Church Teaches About Lent
1. General Norms for the Liturgical Year and the Calendar
"Lent is a preparation for the celebration of Easter. For the Lenten liturgy disposes both catechumens and the faithful to celebrate the paschal mystery: catechumens, through several stages of Christian initiation; the faithful, through reminders of their own baptism and through penitential practices." (#27)
2. Constitution on the Sacred Liturgy (Documents of Vatican II)
109. The season of Lent has a twofold character; primarily by recalling or preparing for Baptism and by Penance, it disposes the faithful, who more diligently hear the Word of God and devote themselves to prayer, to celebrate the paschal mystery. This twofold character is to be brought into greater prominence both in the liturgy and by liturgical catechesis. Hence:
a) More use is to be made of the baptismal features proper to the Lenten liturgy; some of them, which used to flourish in bygone days, are to be restored as may seem good.
b) The same is to apply to the penitential elements. As regards instruction it is important to impress on the minds of the faithful not only the social consequences of sin but also that essence of the virtue of penance which leads to the detestation of sin as an offense against God; the role of the Church in penitential practices is not to be passed over, and the people must be exhorted to pray for sinners.
110. During Lent penance should not be only internal and individual, but also external and social. The practice of penance should be fostered in ways that are possible in our own times and in different regions and according to the circumstances of the faithful&
Nevertheless, let the paschal fast be kept sacred. Let it be celebrated everywhere on Good Friday and where possible prolonged throughout Holy Saturday, so that the joys of the Sunday of the resurrection may be attained with uplifted and clear mind.