It always baffles me. When people make up religions, afterlives, and gods, they could imagine anything, and certainly better ones than existing religions offer. Instead their substitutes tend to be worse. This person basically imagines David Bowie's afterlife as an ectoplasmic Studio 54, where only the truly cool people get past the bouncer.
It's kind of like the Rapture. If you're still here, you have been weighed in the divine balance and found wanting. That includes Miss Texas 1967, who like the rest of us losers will get to experience the Tribulation to come, with all its horrors. Does she (or the people who've shared this tweet) really find it comforting to imagine Bowie and, e.g., Carrie Fisher partying for eternity, with an inexhaustible supply of Ecstasy, coke, and cocktails, while she hovers in the outer darkness, with only a dwindling hope that The Thin White Duke will take her before midnight on December 31? I wish I could take seriously the possibility that she meant her fantasy ironically, snarkily, satirically, but the person who shared it has been dead serious in cursing 2016 and all its works, and I doubt Miss Texas 1967 is any different.