How to reach Martial Arts Club: Central?

I've been wasting loads of time trying to figure out how to get to this on my map. I wasn't fussed but now I have a favour there also and I can't for the life of me figure out how to get up to it.

The spot is opposite Rolands Garage.
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There is an art gallery to the east of the parking, but no way to go up inside.


Solution 1:

Irony strikes, I found it as soon as I posted this question. On the far west end of the greyed out path are a set of closed blue double doors. These you can run through and up the stairs.
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