viva la fiesta
bienvenido a la fiesta
To say "you're welcome," you would say "De (prononced day) nada." It literally means "of nothing". It is like saying in English "think nothing of it" in response to someone's thank you.
Bienvenido y gracias por unirte/unirse a nuestro grupo.
Tu fiesta
fiesta
Por favor ven a nuestra fiesta
the best way would be to say "fiesta de bienvenida", which is literally "welcome party". intrestingly enough, when a man has a stag night, or batchelour party, it is known as a farewell party, "fiesta de despedida".
fiesta
buena fiesta
Fiesta pequeño.
To say "welcome to Venezuela" in Spanish, you would say "bienvenido a Venezuela."
you say, "quien esta en la fiesta?"
Assuming the phrase is "You ARE all welcome to the party tomorrow," the answer would be: Son todos bienvenidos a la fiesta mañana.