Have you ever invited a client to maintain contact and, if so, what level and type of contact did you intend?
I'm very new and have met two guys, both while traveling abroad, who have suggested post-date contact, while knowing that I was visiting. The first was pretty clear. He asked me to let him know the next time I was in Europe. Sure enough, when I let him know I was planning another trip, we were able to arrange something.
The second asked whether I minded staying in touch on WhatsApp, and I said that I didn't. At the time, I thought he was inviting an occasional "how are you?" We exchanged a few messages for a day or two after our date, agreeing that we both enjoyed ourselves and discussing the possibility of another date during a future return visit. Since then, my messages have gone unread (one a follow-up on a conversation that we had about traveling and the second to let him know that I'd scheduled a return visit). I haven't been blocked, so I don't think its personal, but I'm curious if I misunderstood his suggestion. FWIW, English was his second or third language, so his word choice may have been a bit off.