@turkay1-- First, let me put it out there that I'm not an expert. This is just my opinion so please don't make a decision based on this alone.
When I was on nitrofurantoin, I did have one beer on two separate occasions. I didn't have any side effects or any problems. I think that nitrofurantoin is one of the better antibiotics that is not as dangerous when combined with alcohol. My friend had a drink while taking the antibiotic metronidazole once and she did have bad side effects. But I haven't heard of that happening with nitrofurantoin.
So I think that for the most part, if you drink moderately, it will be fine. The emphasis is on the moderate part though. It's not a good idea to have more than one or two light alcoholic drinks regardless of which antibiotic you're taking.
Like I said, please don't make your decision based on my experience. Check with your doctor to make sure.