I am attempting to stick to twice a month, did that for January, and have my 2 nights for February locked in as tomorrow and then again on the 26th.
Loving it, am thinner, quicker, more alert, richer, and getting much more stuff done.
Also enjoy that it is now an event, the limited time makes me really invest in it, organising an event and drinking good beer and good wine with a load of people while doing some sort of planned activity, or seeing a band/movie/show whatever is going to work out well.
The 2 hangovers so far have really made me question why I drink at all, I can see myself getting down to just drinking on major events, birthdays etc in the future, but for now twice a month will do me.