Some idea here https://familyfocusblog.com/backyard-summer-party-ideas-adults/
Here is a fun diy for that https://www.hometalk.com/520243/building-a-tiki-bar-from-pallets
Melinda: here are some affordable party ideas! HAVE FUN!
Check out Dollar Tree, they have a lot of tropical items.
Friends of ours had a Hawaiian party. So fun. They had pineapples as centerpieces. They used grass skirts (from Dollar Tree) as skirts around all the tables. Also, hang lights for party mode.