Work is nearly finished in downtown Los Angeles on CitizenM, a hip hotel for international travelers made of prefabricated rooms that were craned into place like a child’s building blocks. The Dutch developers who launched the project before the pandemic are not rushing to open its doors, but they have carried on building in anticipation of a time when people will again venture from city to city for fun and to try new restaurants and strike up conversations in hotel lobbies with friendly strangers. “One thing people miss being locked up in isolation for such a long time is social interaction,” said Menno Hilberts, who oversees development for CitizenM. “I do expect that once people are able to travel again that there will be some catching up.”