The man in scale mail -who introduced himself as Arius to the one who joined the game last- didn’t mind sharing rooms, as it is good to have a roof to sleep under to begin with.
Anyone who would tilt their head towards his backpack could see some long sticks protruding from it, most likely implying that Arius possessed either a small tent or -for whatever reason- literally just some long sticks.
The main reason why Arius chose to stay at the inn is simply food. There were also other reasons such as reconnaissance and making contacts, but nothing motivates mankind more than food. And the inn has some good food.
((One: What’s a copper coin called? Two: Can I roll 1d10 to see how much copper coins I lost?))

3