Learn Farsi: الگوهای شما خیلی شیک نیستند.

You would use چه ... چه ... (whether ... or ...) with the subjunctive form of the verb. It becomes چه الگوهای شما شیک باشند، چه نباشند. Notice how the verb changes from the indicative نیستند to the subjunctive باشند and نباشند.

Why is the verb نیستند (they are not) plural when the subject consists of inanimate objects?

In everyday spoken Farsi, non-human plurals like الگوها (patterns) usually take a singular verb (نیست). However, in formal, written, or careful Farsi, it is completely correct to match a plural subject with a plural verb like نیستند.

Why is there an extra ی (ye) attached to the end of الگوها (olgu-ha)?

This is the Ezafe connector linking the noun الگوها (patterns) to the pronoun شما (you) to show possession. Because the plural suffix ها ends in the long vowel "a", a consonant ی (y) must act as a bridge for the Ezafe "e" sound. It is pronounced "olgu-ha-ye shoma".

The word شیک (shik) sounds just like the English and French word "chic". Is it a loanword?

Yes! Modern Farsi borrowed many words from French over the last century or two. شیک is a direct borrowing of "chic" and is used very commonly in Iran to mean stylish, elegant, or fancy.