On Wednesday, Viall – who first competed for Andi Dorfman's heart on her season of the show – was spotted on a date with a brunette gal pal at Toca Madera in West Hollywood.
Wearing a tight black mini dress, Viall's date cozied up to the Chicago native during dinner while they caught up over tequila drinks.
"She was resting her head up against his shoulder and holding his hand throughout the night," says an onlooker.
Viall was said to be in "good spirits" during his night out, and his mystery girl left first at the end of their dinner date, adds the source.
Meanwhile, across the country, Bristowe and her new fiancé Shawn Booth had one of their first public dates at The Knickerbocker in New York City.
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"@theknickNYC had us while filming and we loved it so much we had to go back! Such a nice little dinner date at @Cpattheknick," the captioned a cute Instagram photo of the couple.