I've had beers and wine in western restaurants representing cuisine of muslim-majority countries, that's nothing special. Its up to owner to decide whether they want to cater to wider local audience or be strict. For example beers attract a lot of people, we like to pop a small one with lunch as digestive.

I am not saying what is or isn't possible in russia or how chechens are viewed by russian populations, but the whole concept is more than fine elsewhere.