Not really an option right now, but really nothing is other than something online, but once things get back going one thing you will for sure find close to home, and something low key and no pressure, would be to attend an off-premise meet and greet together. Easiest way to find these would be joining one of the online sites like swinglifestyle. You should find event listings for your area, and they are nothing more than swingers gathering together at a bar or restaurant to socialize. No sex, no nudity, just people gathering to socialize. You'll be able to pick up on the vibe though and have the opportunity to talk to other swingers and get a feel for what this is all about.
Same rule is going to apply though, if you attend by yourself you are going to be looked upon with suspicion. A lot of them are couples only too, and you for sure do not want to represent yourself to the organizers as a couple and then just you show up, that will be a quick way to get black balled.
See how that goes and then if it goes okay, then next step would be to attend a social, again, find them on swinglifestyle, etc. These are still off-premise, so no sex, but since the organizer usually rents a hall or banquet room at a hotel and access is restricted, then things can be a little sexier with what people are wearing, dirty dancing, etc.