Nov 16, · Use these simple party ideas from readers to turn your next get-together into the most happening bash in town! even full-grown adults. 13 Summer Party Ideas to Try This Year. Party . May 09, · Summer Birthday Party Ideas For Adults 1. Sparkler Party. Break out the sparklers for this fun evening summer birthday. And don’t forget, champagne and 2. Boat Night. Nothing says “summer birthday” like a sunset or evening cruise with your besties. Stock the .