The iconic Welcome to Las Vegas sign turns 50 years old and Mayor Oscar Goodman will mark the occasion at 10 am when he proclaims the official start of summer (hey, it’s our city and it was 97 degrees yesterday, so we’ll start summer when we wanna). To celebrate the event the Fashion Show Mall will host a swimwear retrospective runway show followed by a Bikini Parade, which will shut down The Strip for a short time in an attempt to set a new world record.

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Red Robin Gourmet Burgers (9600 S Eastern) will hold a book signing event with UNLV Runnin’ Rebel basketball coach Lon Kruger and co-author D.J. Allen from 5-7 pm. Receive a $5 off coupon with the purchase of “The Xs & Os of Success.”

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Rick Estrin & The Nightcats stop by the Railhead at Boulder Station for Boulder Blues (8-11 pm). Admission is free.

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McFadden’s at the Rio is all set to host not one, but two events this evening and it all gets started with the SpyOnVegas open bar from 6-9 pm with complimentary Semental Tequila. Immediately after that it’s Greek Wars where the ladies drink for free until midnight. Anyone wearing appropriate fraternity/sorority attire (togas count!) get free entry into the Beer Pong tournament with the chance to win a keg party with bottle service.

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Anthony “Tony” Vennio, Brent Jamenson Band and Slow Children share the Courtyard stage at the House of Blues for tonight’s Acoustic Soul concert. Doors open at 9 pm and admission is free.

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Helldorado Days entertainment continues at the Fremont Street Experience with the Scotty Alexander Band on the 1st Street Stage (8-11 pm) and Third Town (8-11 pm). Click here for more information on ticketed events.