Room set to 15m × 15m (from the venue's own dimensions: 15M × 15M, ceiling 5.5m, pillars inset ~1.75–2m from the side walls). The dashed line marks the 11.8m sliding doors to the courtyard; the grey strip along the top is the kitchen/tech room/toilets back-of-house zone. Drag to move, drag the small circle to rotate, ✕ to remove. Tables, DJ booth and bar are unlimited; the two plant types are capped at what you've actually got (2 bushy plants, 10 smaller plants).
Export gives a to-scale image — print at "actual size" (not "fit to page") on A3.