Sounds possible...
(Sunday May 18) "From 11:00 AM till 3:00 PM, Bluegrass Hawai`i Traditional & Bluegrass Music Society will host Pickin' In The Park, a FREE bluegrass & traditional music jam session at the Wahiawa Botanical Garden at 1396 California Avenue.
Musicians of all skill levels who play unplugged traditional instruments and enjoy acoustic bluegrass, newgrass, mountain, roots, country, Hawaiian, Americana, folk, Western, Celtic, and Irish music are invited to jam along (Listeners, of course, are welcome, too!).
http://www.honoluluadvertiser.com/apps/pbcs.dll/article?AID=/20080513/GETPUBLISHED/80513041/-1/LOCALNEWSFRONT
http://www.bluegrasshawaii.com/