There is nothing wrong with Christians consuming alcohol, but getting drunk is definitely a sin (Ephesians 5:18). There are some additional things to consider, the weaker brother (Romans 14). It's probably not a good decision to drink around someone who struggles with alcoholism. For this reason it is good wisdom to make sure you are not offending anyone when drinking in a group setting. This is particularly important when you are with other Christians. If you are having dinner with someone it's a good decision to ask them if it is okay for you to order a drink. If they have a problem with it, it's not a good idea to press the issue any further.

So go ahead and have a drink, but don't forget who you are with.