When entertaining larger groups in small spaces, I find it helps to have mini stations (for food, beverages, a bag/coat drop, etc.) instead of one main area dedicated to this-or-that. Compact entertaining spots positioned wisely around your tiny home and/or garden will naturally break up large clumps of people, and allow folks to move around with greater ease. We did this for our wedding brunch with lil' mimosa stations:
I placed a 3-tier bar cart in the shade of our bougainvillea and grapevine to hold our CB2 champagne flutes, baked goods, fresh market produce, plants, and the beverage dispenser with sparkling wine mimosas from Winc. I upcycled an old wine crate top to make a space-saving hanging shelf where we offered Boxed Water that guests could take with them when strolling the canals throughout the brunch. (As I'm midway through my pregnancy, I had to refrain from enjoying the drink stations. While it's obviously well-worth it, I gotta say that I've never been so sad to say no to a mimosa-- especially after hoofing it through a DIY home-wedding!)