PD, if your guy hit me solid in the back of the head, he'd have 4 broken knuckles to show for it, according to my parents. You did the right thing by assertively defending yourself, then immediately disengaging. Who knows if he was on something, just mentally troubled, or both.
Relative to the main subject at hand, pre-covid my office was on the block with Osaka for two decades, and none of my co-workers knew the place existsed (or my occasionally patronizing it). There are several garages within one block, at least one of them is 24-hrs/valet, and most of the others close at 11PM or Midnight. Nighttime garage rates are not expensive when compared to the session costs.
If you're the "need to see a lay of the land" type, just walk to the new W hotel and look around the lobby like a tourist. If you're OK with the sidewalk scene, walk out like you own it, go over to Osaka's door and go in. I've walked in during a crowded lunch hour on a nice day, and it only ever looked like I was going into an office. Same coming out.
The only thing I do not recommend is using Osaka's rear door on Ranstead street. It's in a dark corner between loading docks that the homeless regularly use as either an campsite, a toilet, or a stash location (or all 3 simultaneously). One never knows what you will smell or witness coming out that door.
