@oxb
I don’t know any gastropubs, but I like to spontaneously visit a Spanish restaurant and sit at the bar (they don’t accept reservations for it)
Sabor is more foodie
https://maps.app.goo.gl/Um1tDfHteTZwDbCg7?g_st=ic
This one is more casual but I really like it: https://maps.app.goo.gl/AtxFsDg8MK4U2Su26?g_st=ic