1. If your experience is anything like mine, there will be very little 'clubbing' at the weekends. Most student nights are during the week, so going at the weekend when there's non-student pricing is rare. So you won't be avoiding the clubbing by going home at the weekend.
2. One of my flatmates went home every weekend. She said she wished she'd spent more time at uni.
I personally think it's a bad idea. You're obviously moving away from home/not going to your local uni for a reason, so, in my opinion, it seems silly to specifically move away and then not immerse yourself in your new home.