From ToledoRamblingMan: Do any Toledo churches kick out members, excommunicate them these days for certain sins or are most churches afraid to pass judgment on members and welcome all types of people, regardless of their lifestyle, into their church to have communion each sunday?
I'm sure a few churches have asked members to leave or excommunicated members for one reason or another. One christian church in Toledo had a pastor who was mentally ill and the man did any number of terrible things to the congregation before he was replaced. I think he was pastor of this church for well over a year.
Certainly there is a reluctance to chastise members for their behavior, however I think that most churches will ask a member about questionable behavior, or inform them their behavior in in direct contradiction to Scripture and should be changed. I don't have any first hand knowledge of anything like this happening, but I've been told that it does happen on some occasions.
As far as welcoming everyone for services, I would say that not all churches fall into this inclusive category. There's one church here in Toledo that will refuse to allow any women into the service who are wearing pants. Women must wear a dress of very modest length. Men must wear a coat and tie to be admitted. Setting churches like this aside for a moment, the others will welcome everyone for services with the caveat that they conduct themselves appropriately. For instance, an alcoholic is welcome to attend, but not welcome to show up drunk, nor should the alcoholic expect to have their lifestyle affirmed as acceptable. Gay people are welcome to attend, but open displays of affection for their same sex partner are not welcome, nor should they expect the church to approve of their lifestyle. Divorce is a problem for some Christians who want to remarry. I think the Catholic Church has some kind of official divorce you can buy from the bishop or someone which allows remarriage.
Once you're seated, I don't think any protestant church would prevent you from taking communion (the Lord's supper). However, the pastor would likely inform you that communion is for believers only. If you aren't a believer, you shouldn't take communion.