Depends on the tourists - there's a lot of tourists that fit in the scene very easily, there's some that don't. It's not a requirement but if you already listen to the artists that are going to be playing you are in the first group. Tresor has pretty decent lineups while still being a bit more touristey but it's not a tourist trap or an ibiza-style club or anything like that. The crowd is generally considered a bit worse than the cool clubs, but nowhere near as bad as the actually uncool clubs (like say Watergate).
Tresor: As a tourist, could enter because I knew the DJs on the lineup and was wearing a black hoodie. Guy behind me with a fancy shirt got rejected subito, no questions asked.