Two drink MAX before a wedding speech
There is nothing wrong with a little “courage juice” aka alcohol before a wedding speech. However, that alcohol should be kept to a minimum if possible. You would hope that the wedding guests themselves have had a few in them so they are more receptive to whatever you are planning to say in your speech. If you ignore having a couple of drinks, you may end up being the most memorable part of the wedding… and not in a good way either.