It's typical here, too. At all the funerals I've been to here, the visitation at the funeral home takes place the evening before the funeral. After the funeral, the church provides a volunteer-supplied and -served luncheon in the church hall. No alcohol there.
[As an aside, my son and his friends, who were at the Catholic school attached to our church, often would be recruited as altar servers for funerals. Not only were they generously tipped by the family, but they also were able to eat at the luncheon afterward. One time, he said he'd had three sandwiches! I was slightly horrified: "Did you leave anything for the mourners?" (

) But a friend of mine on the volunteer committee assured me that the mourners were fed first, and the altar servers were permitted to consume whatever was left over.]
I'm not sure alcohol at a funeral parlor is a good idea, but as others have already mentioned, people will be just as likely to drink at a bar or some other venue.