As for me I would just feel weird showing up without my wife - despite the fact that my wife has attended a few 'events' without me.  I feel like a single woman is always welcome but single men, much less so.

As for us that would feel a little awkward.  We would accept on the condition we pay for incidentals such as maybe a rental car or the cruise bar tab (often not included in base price).

7 minutes ago, AdamGunn2 said:

How long is the vacation?  A few days, sure. Two weeks, probably not.

How well do you like the other couple?

Do you think that because they're paying, they get to dictate what is done and when it's done?  Or are they going to allow you the freedom you might crave from time to time.

Not enough information for me to decide.

For you, let's just say 5 days, you like them very much, and absolute freedom for both couples.

How long is the vacation?  A few days, sure. Two weeks, probably not.

How well do you like the other couple?

Do you think that because they're paying, they get to dictate what is done and when it's done?  Or are they going to allow you the freedom you might crave from time to time.

Not enough information for me to decide.

This is just hypothetical.

Suppose you and your spouse had a couple that y'all regularly swing with. The other couple decided to plan a vacation, whether it was to the beach, camping, a cruise, to another country, etc. The thing is, they want to bring you and your spouse along, so you all can have fun together. Good news is that you and your spouse don't have to spend a single penny just to go on vacation with them. That means, they already paid for hotel/motel (or for a room on the cruise), they will play for tickets for any flights, they will pay for gas, they paid for meals, etc. And all you two had to do was go with them, away from life and the kids for a few days.

Let's say they already planned a month or two ahead of time.

Would you both accept or decline?