SINGLES BLACK & WHITE BALL--With Ron "The Dancin' DJ" Bolin, psychic readers, booths promoting various singles' groups, a no-host bar, and lotsa well-perfumed young suburban adults trying to market themselves. Bellevue Hyatt Regency Hotel, NE 8th & Bellevue Way NE, Fri April 9, 7:30 pm, $35. 243-8536.

LIGHT RAIL, HEAVY TALK--The Seattle Community Council Federation hosts real-life Sound Transit officials, prepared to explain why they won't build the south-end subway tunnel everybody wants. Mt. Baker Community Clubhouse, 2811 Mt. Rainier Dr S, Sat April 10, 9:15 am-1 pm. 525-9070.

SHRINE CIRCUS--Your basic cleaned-up, mainstream American circus. No big top, no rigged carny games, and no freaks (not in the show, anyway). KeyArena, Sat & Sun April 10-11. 684-8582.

DIANA, A LASTING TRIBUTE--Traveling display of pictures and artifacts for all Princess Di fetishists. SeaTac Mall, daily through Sun April 11. 253-839-6150.

LASER SHOWS-- Rock out to like, really groovy laser demonstrations set to the sounds of Led Zeppelin, Hendrix, Beastie Boys and more! Pacific Science Center, call for show times, $7.50. 443-2001.

SWING DANCE LESSONS--Learn to Lindy hop just in time for the retro fad to be over. Seattle Center House, Wed nights, 7:30 pm, $5. 684-7200.SPORTSSUPERSONICS BASKETBALL--A disappointing season dribbles on in KeyArena vs. Portland on Thurs April 8 and Phoenix on Wed April 14; both at 7 pm. 281-5800.

MARINERS BASEBALL--The last half-season ever of Kingdome baseball continues vs. Oakland on Fri-Mon April 9-12; and Texas on Tues-Thurs April 13-15. 622-HITS.

WORLD WRESTLING FEDERATION--This is the one on the USA network, not TNT (i.e., it's the better one). Key- Arena, Thurs April 15, 7:30 pm. 628-0888.

CO-ED AMATEUR SPORTS--This week, the Seattle Sport and Social Club's forming co-ed leagues around Seattle in softball, flamesag football, flamesoor hockey, indoor volleyball, soccer, and swing dancing (that's a sport?); plus all-men's basketball. 206-328-7772.

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