A party round is a financing round with many small investors (typically 10 or more checks all under $250K) and no single lead investor. It is common at seed and pre-seed stages when founders pull together capital from a wide angel network rather than concentrating on a single institutional check. It is distinct from traditional lead-investor-led rounds where one investor anchors the round with majority of the capital and sets the terms. The term carries a mildly pejorative connotation among institutional investors, suggesting the founder couldn't attract a serious lead.
The structural reality: party rounds typically involve 10-30+ individual angels and small institutional investors each writing $10K-$100K checks, totaling $500K-...