Brace yourself for April showers. You know about the whole flower thing, right?

HEAR
Space Mountain
What: Cloud Room and Film School open up for singer/songwriter Dina Waxman’s melodic, moody rock outfit.
Why: It’s the ride of your life.
When: Sat. at 8 p.m.
Where: Troubadour, 9081 Santa Monica Blvd., at Doheny Dr., West Hollywood (310-276-6168).

EAT
Black Steel Opens
What: Snag a res at table one and watch Chef J prepare Far East-meets-French specialties like Kobe beef filet mignon with jalapeno ponzu sauce.
Why: Perfect for your best Blue Steel.
When: Daily, noon-3 p.m. & 5 p.m.-2 a.m.
Where: Black Steel Restaurant, 6683 Hollywood Blvd., b/t Las Palmas & Cherokee Aves., Hollywood (323-469-3433).

BUY
Ladies Who Launch Trunk Show
What: Jill Vacarra, Stephanie Johnson, and fifteen other fresh designers set up shop for a day.
Why: Prevent failure to launch.
When: Sat., 10 a.m.-6 p.m.
Where: Baldwin & Co., 1021 Montana Ave., b/t 10th & 11th Sts., Santa Monica (310-899-0655).

Sweet Charity’s Half-Birthday
What: In honor of this indie shop’s six-month anniversary, you pick one of six charities (like Hearts for Hollywood and Mac AIDS Fund) to get 10 percent of proceeds of your purchases.
Why: The gift that keeps on giving.
When: Tues.-Sun., 11:30 a.m.-5:30 p.m. (Charities will change again in six months.)
Where: 3318 Sunset Blvd., b/t Micheltorena St. & Descanso Dr., Silver Lake (323-644-8861).

DO
Late-Night Bash at LACMA
What: Live music, DJs, movies, interactive art, and book signings at the museum’s 40th b-day party (plus free admission to Mrzyk & Moriceau’s and Félicien Rops’s You Only Live 25 Times).
Why: Not everyone lies about their age.
When: Thurs., 7 p.m.-3 a.m.
Where: 5905 Wilshire Blvd., b/t Ogden Dr. & Curson Ave., Miracle Mile (323-857-6000). R.S.V.P. at membership.lacma.org.