I think everyone needs to decide for themselves whether they are able to combine alcohol and fluoxetine safely. Of course, a doctor should be advised. I would not try to mix them if my doctor told me that I absolutely can't.
Having said that, everyone is on a different dose of fluoxetine and we all have different physical sensitivity to drugs and alcohol. Someone who is very sensitive to both and who is already experiencing fluoxetine side effects should not try alcohol. But someone who has a very high tolerance to drugs and alcohol, may have a very small amount. It's important to make sure that there are people who can help in case things don't work out well and there are side effects. And a safe ride home should always be arranged. Sometimes it's difficult to guess how our body will react to a drug. So it's important to take it easy. The best thing to do is to just avoid the alcohol.