This is a pretty dead place; what's to do?

Hint 1 of 7:

Investigate the area around the bar.

Hint 2 of 7:

Be careful to look for anything lying around... even on the floor.

Hint 3 of 7:

You'll retrieve several items from this area for your inventory.

Hint 4 of 7:

One is a sonic tuner.

Hint 5 of 7:

You may find a blue mug on one of the tables in the adjacent restaurant (if
you haven't already picked up another mug elsewhere); get it.

Hint 6 of 7:

Another item is on the guy sleeping at the bar.