The apps are your best bet.

Filipino lads seem to be very enthusiastic in bed and satisfied with very modest tips, although some aren't even expecting anything.

Regarding safety, I thought it seemed safe enough to wander around in daytime.

I also tried the metro system, which is perfectly OK, but would avoid it during the busy periods when it's absolutely ram packed. Once the locals force their way off the trains, they are all patting their pockets to make sure nothing has gone. Avoid that by trying it during quiet periods.