We mostly serve it right from the time we start the party i.e. with the starters.
We also make sure we have enough to last us through the entire party even after everyone is done with the dinner. Liquors like wine, sangria & other fruit-flavored ones seem to go well with everything.

We usually serve only at the almost end of the party or with the main course that is before the desserts because we almost always have soup with the appetizers.