additional text field at events
When planning an event, there should be the possibility to enter a (obligatory) text when making the commitment. So you can e.g. specify additional visitors (for example, +1, I come with 1 accompanying person). Useful at e.g. Summer party and you want to bring your wife,which is not part of the community. Or you can ask an other question that needs to be answered by everyone before saying yes, because its important for the planning.