1) Balls 2) Bash and blowout 3) Bashes 4) Benefits, often 5) Big bashes 6) Big celebrations 7) Big dos 8) Big parties 9) Big, fancy parties 10) Black tie affairs 11) Black tie events 12) Black-tie affairs 13) Black-tie parties 14) Blowouts 15) Celebrations 16) Celebratory events 17) Charity balls 18) Charity soirees Found on https://www.crosswordclues.com/clue/galas