8 days/nights in Barcelona from the previous post, this is at Grand Hyatt Barcelona 5*

Rating 8.8 on Trip.com and 8.5 on Booking, that's 15,000 RUB per night in an excellent, one might say luxury hotel, and even in peak season.
Yes, the hotel is not on the seafront, but it's in the Les Corts district, beloved by locals, and football fans will appreciate the proximity to Camp Nou (under renovation), the sports and leisure infrastructure around, and the gardens.

Plus, I'm not sure everyone goes to Barcelona just for the sea.
If needed, there's a metro nearby, El Corte Inglés, and a transport stop on La Avenida Diagonal.

And such gems can be found in almost every city, for example, for the same dates Hôtel Montaigne & Spa 4* in the center of Cannes and three minutes from the La Croisette promenade/beach for 10,800 RUB per night.

Just don't forget the promo code.