Hebrews 10:25 And let us not neglect our meeting together, as some people do, but encourage one another, especially now that the day of his return is drawing near.
Matthew 18:20 For where two or three gather in my name, there am I with them."
It doesn't have to be an expensive clubhouse filled with people. It can be two or three, and it can be online. There are Christians in other countries you can't assemble with in person, but you can assemble with them online.
Denominations are divisions that divide the Body of Christ, which is a sin. Disobedience. You don't want to be a part of that!
Galatians 5:19 The acts of the flesh are obvious: sexual immorality, impurity and debauchery; 20 idolatry and witchcraft; hatred, discord, jealousy, fits of rage, selfish ambition, dissensions, factions