Wheres a good place to hang out?

i BROUGHT an older guy to a semi formal dance and we danced for only the slow songs and a few fast songs. but now i like him and i wanted to hang out with him, my friend, and the kid she likes who went to the semi formal dance with her. where do we go, but i need a place that it doesnt seem like a double date. we just want to ask the guys if they want to hang out. oh and how often should i text this kid i like because i dont want to ruin our friendship