Plaintiffs failed to allege or establish any irreparable injury by their exclusion from a “unique” swim meet. Proulx ex rel. Proulx v. Illinois High Sch. Ass’n.
 The mere allegations of irreparable damage alone is nothing more than a statement of a conclusion, and hence, an insufficient basis for injunctive relief. G. H. Sternber & Co. v. Cellini.
 Reasons which the plaintiff set out in his complaint, wherein he stated he had no adequate remedy at law, sufficiently showed irreparable damage of the degree necessary to authorize the granting of preliminary relief; the landlord was required to restore plaintiff to possession of his apartment where plaintiff alleged that he had no place to live and did not have the use of any of his personal effects as a result of the landlord’s conduct. Brooks v. LaSalle Nat’l Bank.
 The factual allegations of the complaint showed the necessity for an injunction; and no prayer for waiver of notice or any averment that the giving of notice would be prejudicial, were necessary since the court could conclude from the facts which were alleged, that the plaintiff would suffer irreparable and substantial injury if the injunction was delayed until notice could be given. Streamwood Home Bldrs., Inc. v. Brolin.