One of the fun aspects of writing erotic romance is picking a theme or fantasy and then finding different ways to use that theme/fantasy throughout the story.
For me, it's usually something more general than a location (e.g., dom/sub, or sex with a stranger or voyeurism or whatever), and then I'll have the characters explore that underlying theme/fantasy in different settings.
So, for instance, if the overall theme is one partner's dominance over the other, then they might play that out in a conversation in one scene and in the kitchen in another scene and in a shower in another scene, but they'd all be tied together (no pun intended, for once) by their exploration of that underlying theme.
JD