Is the Ramadan Ghabqa permissible, which is usually a dinner before the last ten days [of Ramadan], and includes meals, competitions, popular songs, and traditional clothing?

"Ghabqa" is a permissible feast, and the basic principle regarding customs is permissibility unless there is evidence to prohibit them, provided that it is free from forbidden things such as extravagance, wastefulness, showing off, and squandering the nights of Ramadan in amusement.