As an idea, Irecently discovered that American people like Russia made watches. For example the trade mark POLJT. You can find the variety of models and can visit the store at the watch factory.
The "POLJOT" shop is located right next to the "First Moscow Watch Factory".
Only here you can purchase "POLJOT" chronorgraphs and clocks at affordable prices.
It is located next to metro-stations "Proletarskaya" and "Krestyanskaya Zastava",
exit onto Vorontsovskaya st., from here on its a three minutes walk to Novoselskaya st.
As for trendy place to visit and to have a good time and dinner, I would recommend VOGUE cafe. The prices are average but make sure you have the well advance reservation for this spot.
It is also a place where you can encounter Russian celebrities and youngsters visit it very often. Overall the style of the cafe is very unusual for Moscow.
Another, but may be more expensive option is cafe Pushkin. Located inthe center it represents the high style of service and authentic Russian cusine with the most remarkable interiors. It is also crowded all the time and open 24 hours. The reservationis essential.
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It is the simple things in life that make living worthwhile - sweet fundamental things such as love.