Yes and no. Ladies night with only my single friends is no good but with my married/committed friends no concern whatsoever. I think it has mostly to do with the attitudes and how it affects me. My single friends tend to do a ton of man bashing and I usually leave those events annoyed/riled up. Although my other friends may complain about their men it's way different and I don't come home with a cloud so hubby is perfectly happy with me going out. And funnily enough my settled friends party harder/stay out later/ get more intoxicated...I think it has to do with living it up due to the high cost of sitters.
I also don't have a problem when they have guys nights in the same way. Honestly I think it's mostly to do with the attitudes/ behaviors of certain groups of people and less to do with the fact that it's a night out. For example, I find single friends are prone to saying stupid things about what my husband will let me do, or egging on to entertain a guys attention for a free drink. That kind of foolishness never happens in the off the market group I hang out with. I've been approached and before I could open my mouth the dude was quickly told to back off because we were all taken. It's like I can go out and be free to let my hair down without cause for concern. Hope my rambling makes sense. Lol.