Time to find another pub where your efforts will be more appreciated.
We've had similar at a local session. Pub under new ownership, tolerate us but aren't really bothered, we don't feel welcome and there's another one down the road where the landlord is really keen to get some folk music going because he likes it and it's very quiet midweek. So next month's session will be in the new place and we'll see how it goes.

Don't waste energy on the ones that treat you badly. Yes it is rude; that's the pub's problem but you don't have to make it yours. Plenty more fish in the sea.

Anahata