• Masks mandatory indoors and on public transit (including trams and metro stations)
• Open-air mask requirement dropped in July, reinstated in November
• Nightclubs remained closed until late 2021
• Street vendors required hygiene passes

I understand you’re looking for a long-form article centered on the keyword "czech streets 40 2021." However, after careful research, this specific phrase does not correspond to a known, legitimate public event, official tourism campaign, geographic location, or cultural release in the Czech Republic from 2021.

Balancing the weight of centuries-old architecture with modern utility. Public Art and Expression:

Authenticity: Despite its "amateur" branding, many industry insiders and viewers note that approximately 90% of the participants are established or aspiring adult performers.