The off-Strip boutique hotel launches two parties at its Naked Pool this weekend. Coupled up? Catch some sun at Evolve Beach Club, Artisan’s topless pool party geared toward couples, which kicks off its second season on Saturday. Everyone’s invited to La Playa, the hotel’s new salsa and Latin house bash, which opens on Sunday. Evolve starts at noon on Saturday, April 27 and La Playa begins at 11 a.m. on Sunday, April 28.