The Illeagles will perform at a special New Year’s Eve show at 8 p.m. Wednesday at Rancho Nicasio at 1 Old Rancheria Road in Nicasio. The event will include party favors, champagne, a ball drop and more. Dinner reservations are from 6 to 8 p.m. $67 admission does not include dinner. Go to ranchonicasio.com.

Stu Allen and Mars Hotel will pay tribute to the Grateful Dead at 8 p.m. Wednesday at HopMonk Tavern at 224 Vintage Way in Novato. Admission is $74.09. Go to wl.seetickets.us/HopMonkNovato.

Bay Area psychedelic soul band Monophonics throws a New Year’s Eve party at 9 p.m. Wednesday at the Sweetwater Music Hall at 19 Corte Madera Ave. in Mill Valley. Admission is $84.98. $162.23 includes admission to the pre-show cocktail party from 7 to 9 p.m. Go to sweetwatermusichall.org.

West Marin Groove Union, a group featuring musicians who have performed with acts such as Wham!, Milli Vanilli, Warrant, Soul Ska and more, performs with featured singer Kate Lamont at 9 p.m. Wednesday at Smiley’s Saloon at 41 Wharf Road in Bolinas. Admission is $17.85. Go to smileyssaloon.com.