H1954
It's a major step for the alcoholic to acknowledge their personal situation and even more so to ask for family support. Personally, I have always held the opinion that 'I don't need a drink to have a good time'.
If I were hosting this event I would not serve alcohol at all, there are so many alcohol free options available now and a lovely homemade posh fruit punch might make a nice alternative.
Why would the occasion be spoilt by the absence of alcohol?
I wish the recovering alcoholic well and hope the event is a success.
... I don't drink alcohol, so I'm not saying this from the perspective of one who does - but I think the fact that you have stated that "personally, I have always held the opinion that I don't need a drink to have a good time" is rather haughty and smacks a tad of moral 'superiority'.
I'm sure many people who drink can also have a good time without alcohol - but if they enjoy a drink in a relaxing environment, why should anyone object... or assume that they're only having a 'good time' because they're having a drink?
As for the alcoholic - he/she is possibly going to be faced with many situations where alcohol is involved, and it is up to her or him to just not drink (assuming the host provides alternatives - which most seem to do). Or, refuse the invitation if he/she thinks they might waver.
When I go to dinner with friends who drink I wouldn't dream of expecting them to not serve alcohol just because I'm teetotal. I simply don't like the taste of alcohol, others do and should be free to enjoy what they like without being guilt-tripped.