Communion is strictly for Christian believers in Christ, whether you are a Methodist or Lutheran. If you are a believer, then you can look further into whether you should take it or not.
There are several rules set out in Scripture.
First, the pastor or elder should "guard" the table. That means he should speak of the blessing for believers and the dangers of non-believer's taking the elements, explaining exactly what it is. If he does not, then it is not proper for anyone to take communion. This is the main reason that Paul admonished the Corinthian church.
Next, the pastor or elder(s) should administer the communion. God holds them accountable.
Believing sinners are welcome at the table but anyone knowingly in an ongoing sin that they refuse or don't even try to repent from are also warned not to come to the table. This is guarding your heart.
We attended a wedding this weekend and the pastor basically just said "come up and get it" and everyone was uncomfortable. Non-Christians felt obligated and Christians were not given any instruction. Many people left as soon as the service was over because they were offended that the table was simply a loosy-goosy step in the wedding ritual.
If you don't feel comfortable taking communion it would be perfectly appropriate to stand in your position until all are through. If you do feel comfortable I would ask the wedding coordinator or pastor if the wedding party could go first so they could get back into their positions without trouble.
This may have been more than you were looking for but we should take communion very seriously as it is one of our means of Grace. You are very wise in asking your question!