I will smoke a cigarette or two in social situations. I'm not a regular smoker. Can I be a Christian and be an occasional smoker. With all the Covid stuff, an occasional cigarette is relaxing.
This is a bit more complicated than a simple yes or a simple no. Three things to consider:
1. Knowledge and understanding of a thing
2. Your conscience. The part of man that tells us of right and wrong
3. Your temple where God dwells.
Whatever does not proceed from faith is sin.” For example, if a person is taught and comes to believe that wearing lipstick is a sin and then wears lipstick, that person is sinning. The sin resides not in the lipstick but in the
intent to act against what one believes to be the command of God" - R.C. Sproul
Our conscience must be trained and molded with truth. If you have correct knowledge and understanding about God and about cigarettes, and your conscience is telling you it's bad, you shouldn't go against your conscience. That is sin.
BUT that does NOT mean you are not a Christian.
Now for the temple. There is not one good benefit from smoking cigarettes, but there are a host of bad side effects you get from smoking. Ultimately you are willingly killing yourself. Not only that but you are gladly paying somebody else to do so. Joyfully paying someone to help kill yourself does not sound Godly. Instead it sounds crazy, but not surprising. Death and sin feels and taste good. Just ask Adam and Eve. You are precious in Gods sight. It's impossible that He takes joy in watching his children kill themselves. Not only that but you are defiling His temple. In the Old Testament you would be killed for walking in the temple and destroying it. Something like that was unimaginable except to the wicked gentiles. In our times (New testament) God does not dwell in temples like in the Old Testament. He dwells in us. We should have great respect for His temple. This also go for those who are willingly killing themselves with food.
Now don't feel to bad. This great respect must be learned. We do not automatically have it. Through His spirit and the process of sanctification, He will help you gain this respect. Through learning more of Him He will prick your conscience and you will start to change and become more like Christ. I hope this helps.