Can you swing if you got erectile dysfunction successfully ?,
Few people will consider that a man with an erection is essential for any satisfactory sexual intercourse to take place. Experienced swingers are likely to be well clued up on what possibilities exist, and some might be looking specifically for a hard cock, but penetrative sex might be a fairly small percentage of everything which goes on, and even then there are alternatives available. The answer to your question therefore, is that it's highly likely that there are opportunities to be invited to join other swingers for some fun and games, subject of course to other criteria being matched.
It is positively sought after in some aspects of BDSM which is now a large part of the swinging scene, it is also popular with those that like Cuckolding.
As for general swinging/swapping, that would depend on the individual with the condition, it depends what sexually does it for them really, some men do not need an erection to reach fulfilment in their mind or body, some reach it by watching, some by humiliation, some by soft play and so on, it is all then down to finding compatible people who are looking for what that person has to offer just as it is for every other swinger.