Red wine and dry white have little sugar. Spirits have even less. Sweeter whites can be quite carby; things like port and sherry are obviously out. A 9% white wine probably has too much sugar. A 13% wine should generally be ok. Beer is generally quite high-carb. Alcohol can also lower blood sugar levels, and block your liver from causing spikes: it's not really a healthy way to deal with things, but I have sometimes had a gin when my readings have been high and it will drop them right back down.
For me, if I drink red wine, I will expect to see a significant drop in my levels. If I have a meal of something like pasta, or if I have birthday cake, I would expect BG levels of 8-9 two hours afterwards, but with wine, my 2 hr result will be in the 5-6 range.