My company writes mostly .NET code, I work in a professional, 'business casual' environment. Both of these things seemed pretty ubiquitous across the corporate software world, however I recently visited a few companies that use PHP/Ruby and nearly all their devs had facial piercings/visible tattoos, etc. and their offices had no apparent dress code.

This might sound funny, but it made me wonder, is there any correlation between specific technology and office culture? For example, have you ever had to wear a suit to a programming job, and if so what technology did you use?