Come about 17:00, I returned to the hotel and changed into my business suit to attend a reception being hosted in the Worldcon members' honor at City Hall. They invited selected members of the convention (weighted apparently based on our participation in the convention as staff or programming participants) and hosted us in a large room in the city hall, which was originally a hotel during the imperial Russian period.
This is a very nice room, and I felt quite flattered to have the city take such official notice of our convention. The food itself was such some salad and not really to my taste, but I liked being at the reception. In particular, I was able to catch up with a bunch of people I needed to discuss stuff with, and I feel a bit more confident about things coming up for Worldcon.
After the reception, I returned to the hotel, where it was at last possible for pre-registered members to collect our credentials. Thanks to being personally recognized by Eemili Aro, I was able to collect not only my badge, but also Lisa's (she hadn't returned from the tour yet), and that's a relief. With more than 5,000 attending members already pre-registered, I didn't want to be in the queues on Wednesday.
Lisa got back late, and we made an effort to go downtown for dinner, but found nothing that both suited us and was open, so instead we bought some groceries and took them back to the hotel. The Holiday Inn helpfully had emptied the mini-bar so we could use it to store perishables.
Tomorrow, when the convention starts, we have no early commitments (unlike the other days of the convention), so we'll probably pay for the hotel breakfast buffet (not included in our free-with-points room). The other days, we won't have time for that. We're still considering our options.