During our visit to Belgium, we took the kids (and parents) for a stay in a nice romantic hotel in the historical center of Brussels.

This is what we found next door:

Yep. A honest to god swingers club.

Things of note:

• The prime real estate location, in one of the most "touristy" places in Europe.
• The clear markings. There is no doubt that this is a swingers club (and not the dancing kind either), in full few of the public. Nobody seems to mind or care.
• The "hours of operation" on the door show that this a 7/7 operation.

In the US, most clubs I have seen have "speakeasy" feeling of hidden locations and schedules, and are usually frowned upon visiting. It's refreshing to see that there are other points of view out there.