Bowling double date, need advice?

Ok so me, char (my friend) and her boyfriend dan and his friend Kris were in town and they basically asked to go bowling on friday, making it really obvious it was a double date. I'm a little rusty with my flirting skills. and I took a liking to Kris straight away and from what im guessing he likes me a bt. I need advice on whatI can do at bowling. By the way my cousin works at bowling and I dont know if he'll be working there or not when I go. I just need some advice on wht I could say or do.