Mick can visit the hospital as well - if he's been defrosted enough.
Try making other choices and buying some items from the shop because some can unlock additional scenes.
Garret and Liam have scenes unlocked by items too but none of the items tied to Garret's are available to buy in the demo. As for Liam, the available snacks unlock scenes for him but thanks to his job they can only be seen on weekends.
All 3 guy's have additional scenes tied to items that are not available in the demo.