Thoughts on increasing probability of a two-for vs single? I actually often prefer a two-set of equally attractive girls (safety issue for them 2 on 1 dynamic), if both of them are fair game

Tryna strategize follow-up gameplan having picked up sisters (one's def hotter but the other is cute too) outside The Jimmy rooftop James Hotel (NYC). Would inviting them both out increase the odds of getting jiggy w/ both vs missing out having one of them feeling slighted somehow, the hotter one (unsure whether younger/older) not leaving her sis behind? Un petit menage arbitrage..

Let 'er rip, fellas