Like you OP, literally 10 seconds away. This was a couple of years back, I messaged a girl from Viva, got a postcode and discovered to my shock it was the next street along from mine. Went ahead anyway as little brain was firmly in charge by then. Besides, she'd offered me a quicky for £20, which was the cheapest punt I'd ever had, and something about that was a thrill in itself.
Turned up, nervous as hell that someone local would spot me - not that they'd necessarily know anything untoward was going on in an anonymous flat - but I managed to slip in unobserved. In the end the girl was hot as hell, exactly my type, very unusual for Viva. Had a great quicky, and left again without incident. Tried to arrange to see her for a longer session a couple of days later, but sadly she'd already done the Viva vanishing act.