I work as a taxi driver and have never accepted offers of sex of the customers when they are drunk, it would be taking advantage.
When i'm drunk though I go on for age's!.
Is being tipsy/merry compatible with swinging? Yes.
Is being so drunk you're slurring your words and talking bollox? No.
I get merry from time to time, but I must admit to being a bit of a control freak so I don't like to get really drunk. The last time I was what I would call properly drunk was about 6 or 7 years ago and was quite accidental. I hate being around people who are really drunk.
I personally would not swing with someone that was pissed as a fart....but would with someone that was slightly merry....
I personally DO get very horny when drunk.....but I'm not sure I would be any good at shagging while really pissed....although I DO rather like being touched or stroked as my skin feels more sensitive and I feel more sensual....