An opportunity to experiment?

After a couple of bites, Jon' stomach seemed content to let his imagination run again. He glanced over at the table opposite him. Sat there were three Asian girls, a couple of years older than himself and Karen by their looks "“ students at the local college, he'd guess. While none were truly stunning, they were pretty enough to draw a young man's eye, which is exactly what happened. One was taller than the others, wearing black trousers and a shoulder less floral top. Another, with long brown-highlighted hair, wore a loose tan dress. The final member of the trio was definitely the cutest, despite the garishness of her yellow T-shirt and orange jeans. Jon lightly touched the rock, and covered his mouth with one hand.
"I wish that until I finished this meal, no-one in the restaurant would notice me making wishes" he whispered. Nothing happened "“ which, he supposed, was a good sign. Drawing a deep breath, Jon got to work