I think this might currently return false for logged out users. 

rob and I have been playing with a 'Null User' class. https://github.com/loomio/loomio/blob/master/app/models/logged_out_user.rb

using it you could write 
```ruby
def hide_beta_logo?
    current_user_or_visitor.belongs_to_manual_subscription_group?
end
```

in `logged_out_user.rb` you would have to add 
```ruby
def belongs_to_manual_subscription_group?
    false
end
```