Vegas trip!

So my husband and I never really go out. Its rare. Our friend invited us to celebrate her birthday and her husbands late birthday at the same time in Las Vegas. What we didn't know was that all girls are sleeping together and doing their own thing and all guys are doing their own thing as well, they also have their own room. And I'm not really ok with this. I don't know why. Maybe because my husband and I are never really apart. My husband said it sounds like it's going for a disaster. I don't know what he meant by that. I'm 7 months post partum and they are also going to a pool party during the day time, and I do not have the body for a pool party. Does this sound like fun? Is this normal? Would you guys be ok with this?