smoking cigerettes?

For the past 2 weeks since its summer i've been going to a lot of get togethers. Thing is i might socially smoke a cigerette or 2 to avoid drinking when i go and i go to about 3-5 different parties a week roughly. I never really thought about the fact it could be stuning my muscle growth during my deca 400mg cycle, also my first cycle, I just start thinking about it and I was wondering if anyone knows can smoking 2 cigerettes a few days a week stun your muscle growth? The cigerettes have been cut btw.