I find this dodgy but know lots that do it once the kids are in bed. I am not a big drinker (at home) so easy for me to say but I prefer to keep a clear head in the evenings at home - if only to get all the bloody school preparation, laundry, packed lunches etc done.
99% of the time it's no big deal I guess as long as they can handle it and still get up in the morning and get to work and get the children to school with all the right bits of kit etc.
However, an acquaintance I knew was a big white wine drinker - at least one a night, sometimes a second. She couldn't really handle drink and used to get really plastered towards the end of the evening - slurring, staggering. One time she went outside for a cigarette, tripped and fell through the glass patio doors. Her dc came down in the dark as he heard her crying, also tripped, landed on the glass. All were taken to hospital (other kids too). Her ex used it against her in divorce proceedings and SS were involved. This is a woman that holds down a good job etc.
Similarly, another woman I know crashed her landrover on the school run and mounted the pavement, hit a guy sitting outside a café and broke his leg. DC were in the car. She was prosecuted as was still over the limit from a bottle of wine the night before.
Really puts me off the mummy bottle of wine in the evening time (that and the amount of calories in a bottle of white wine). I always think what if a child is ill and you are alone and have to call an ambulance or drive to the hospital.