In this case it means a flashy hotel, possibly a 5 star one.

Glitzy means extravagently showy and gaudy, characterized by shiny jewelry, eye-catching clothes, furnishings and decorations. The term implies something fake - being showy and getting attention for its own sake.

Hello Safaa, It usually means showy in a tasteless way. The hotel is dazzling, yet in a superficial manner. Its display could be also vulgar. In your sentence it is a negative connotation , where it is not worth staying in such an hotel.