couple of years ago i flew to Manchester and realised on arrival at the coach station that i’d lost my wallet somewhere along the journey. was panicked and stressed and needed a piss while waiting for my pre-booked coach to Leeds, found you had to pay for the fucking station toilet so ran round to a nearby pub and sidled into the toilet. man behind the bar had a go at me as i was leaving so i tried to explain my sob story but he just kept saying “It’s manners to ask”, which is fair but makes me think even more that he’d probably have said no if i had. think i ended up shouting “SORRY THEN!” and storming out pathetically.
generally try not to make it obvious if i’m doing that though. in Belfast if i can’t use one of the bus/train stations/shopping centres/uni/public toilets, there are a couple of pubs I know are good shouts - a couple that have multiple rooms/back bars and preferably more than one entrance/exit so you can create the illusion that you’re on your way in or on the way out. and one that has the toilets outside the main entrance for the perfect crime.
sometimes consider carrying my work pass around with me even when i’m off, for an easy access hassle free piss.