This weekend: mutt show, gardening fest, Biggie karaoke

The Yale Women’s Slavic Chorus bring Eastern European and Balkan a cappella songs to Brooklyn Heights’s Congregation Mt. Sinai, free.

8pm: The Arms Around Haiti benefit concert at Public Assembly features djs from Other Music and The Village Voice, plus bands, Reggie Watts, more.

10:30pm: My Robot Friend performs songs from his new album, plus Alex Moulton debuts “TRON:Suite” – a live mix of the film’s score and synth music of the early 80’s. Galapagos, $10.

Visit exhibits and workshops on rooftop farming, community composting, more at Brooklyn Botanic Garden’s daylong “Making Brooklyn Bloom” conference. Free with flyer.

10pm: It’s your chance to throw down the rhymes at Hip Hop Karaoke NYC’s 4th Annual Tribute to The Notorious B.I.G. at The Knitting Factory. $5 with flyer.

11am-7pm: Who says pure breeds are best? The Brooklyn Mutt Show comes to Brooklyn Lyceum. $5 admission, $10 to enter your pooch.

Test your beer knowledge at Brooklyn Brew Shop’s trivia night at The Double Windsor. Prizes include black + tan kits, brew mixes, more.

7:30pm: Catch Marina and The Diamonds at The Bell House before the mainstream finds her. (Don’t say we didn’t warn you) $12 advance/$15 door.

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