When I think about a welcoming gathering, I think first about the people coming. A comfortable place to sit and an easy conversation matter more to me than a perfectly matched table.
Choose a manageable invitation
Decide how many people the space can seat comfortably and be clear about the time and kind of gathering. Ask about dietary requirements in advance. For a small afternoon visit, a simple drink and snack can be enough; the invitation does not have to promise a full meal.
Plan the room around conversation
Keep a clear route from the entrance and make space for coats or bags. Arrange seats so guests can hear each other without shouting across the room. A quieter corner can be useful for someone who needs a break from a lively group.
Prepare one useful surface
Set aside a place for water, cups and the things guests may need. Put hot drinks and fragile items where they are less likely to be knocked over. If children are coming, consider their reach and movement when arranging food and decorations.
Leave yourself time to join in
Choose food that does not require constant finishing once people arrive. Wash up what you can beforehand and accept a specific offer of help. I would rather simplify the menu than spend the whole visit disappearing into the kitchen.
Start with what your guests need and let the decoration follow. A gathering feels welcoming when there is time and space to enjoy being together.