Hi all,
knowing how much you all like beer and alcohol and the like, and how some of you are involved in alcohol-selling establishments I thought one of you might know the answer to this little question.
We are having a party - for an organisation in Basel - a celebration party, where there will be lots of fun stuff to do. We are selling tickets to the party - in order to have a handle on how many people are coming but also to recoup some of the costs (by no means all - it's very much a "nominal" fee).
We planned to offer a celebration drink to everyone as they arrive - because it's a celebration after all. We wanted to offer a choice of a beer or a prosecco or a non-alcoholic drink.
Now, the question is - do we need an alcohol selling license for that? We have sold tickets - which in some way "include" a drink - although that's not actually stated on the ticket, it is mentioned in the advertising. But on the other hand we are not actually selling alcohol - no money will be exchanging hands on the day and it will not be possible to "purchase" drinks - basically you walk in, get your glass of whatever and that's it. There won't even be any tokens or anything.
And what about if people bring their own alcohol? Presumably that is OK? So if for example we removed all mention of alcohol from the advertising and then I happened to turn up with a keg of beer and happened to share it with all my friends at the party, would that be OK or is the fact that we sold a ticket still counted as selling alcohol?

Opinions please.
Oh, and if it turns out that we need a license, I even don't know who to contact for that? Is there a special department (Gemeinde level, Kantonal level?)
Thanks in advance for any help